diff --git a/Plugins/org.mitk.gui.qt.ext/src/QmitkViewBrowserWidget.cpp b/Plugins/org.mitk.gui.qt.ext/src/QmitkViewBrowserWidget.cpp
index eb3c13b34e..f927b9a06a 100644
--- a/Plugins/org.mitk.gui.qt.ext/src/QmitkViewBrowserWidget.cpp
+++ b/Plugins/org.mitk.gui.qt.ext/src/QmitkViewBrowserWidget.cpp
@@ -1,589 +1,589 @@
 /*===================================================================
 
 The Medical Imaging Interaction Toolkit (MITK)
 
 Copyright (c) German Cancer Research Center,
 Division of Medical and Biological Informatics.
 All rights reserved.
 
 This software is distributed WITHOUT ANY WARRANTY; without
 even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.
 
 See LICENSE.txt or http://www.mitk.org for details.
 
 ===================================================================*/
 
 //Qmitk headers
 #include "QmitkViewBrowserWidget.h"
 
 // Blueberry
 #include <berryISelectionService.h>
 #include <berryIWorkbenchWindow.h>
 #include <berryIPerspectiveRegistry.h>
 #include <berryPlatformUI.h>
 #include <berryIWorkbenchPage.h>
 
 #include <berryIExtensionPointService.h>
 
 // Qt
 #include <QMessageBox>
 #include <QTreeView>
 #include <QStandardItem>
 #include <QSortFilterProxyModel>
 
 class KeywordRegistry
 {
 public:
   KeywordRegistry()
   {
     berry::IExtensionPointService::Pointer extensionPointService = berry::Platform::GetExtensionPointService();
     berry::IConfigurationElement::vector keywordExts(extensionPointService->GetConfigurationElementsFor("org.blueberry.ui.keywords"));
 
     std::string keywordId;
     std::string keywordLabels;
     berry::IConfigurationElement::vector::iterator keywordExtsIt;
     for (keywordExtsIt = keywordExts.begin(); keywordExtsIt != keywordExts.end(); ++keywordExtsIt)
     {
       (*keywordExtsIt)->GetAttribute("id", keywordId);
       (*keywordExtsIt)->GetAttribute("label", keywordLabels);
 
       if (m_Keywords.find(keywordId) == m_Keywords.end())
       {
         m_Keywords[keywordId] = std::vector<QString>();
       }
       m_Keywords[keywordId].push_back(QString::fromStdString(keywordLabels));
     }
   }
 
-  std::vector<QString> GetKeywords(std::string id)
+  std::vector<QString> GetKeywords(const std::string& id)
   {
     return m_Keywords[id];
   }
 
-  std::vector<QString> GetKeywords(std::vector<std::string> ids)
+  std::vector<QString> GetKeywords(const std::vector<std::string>& ids)
   {
     std::vector<QString> result;
     for (int i = 0; i < ids.size(); ++i)
     {
       std::vector< QString > tmpResult;
       tmpResult = this->GetKeywords(ids[i]);
       result.insert(result.end(), tmpResult.begin(), tmpResult.end());
     }
     return result;
   }
 
 private:
   std::map<std::string, std::vector<QString> > m_Keywords;
 };
 
 
 class ClassFilterProxyModel : public QSortFilterProxyModel
 {
 private :
     bool hasToBeDisplayed(const QModelIndex index) const;
     bool displayElement(const QModelIndex index) const;
 public:
     ClassFilterProxyModel(QObject *parent = NULL);
     bool filterAcceptsRow(int sourceRow, const QModelIndex &sourceParent) const;
 };
 ClassFilterProxyModel::ClassFilterProxyModel(QObject *parent):
     QSortFilterProxyModel(parent)
 {
 }
 
 bool ClassFilterProxyModel::filterAcceptsRow(int sourceRow,
                                              const QModelIndex &sourceParent) const
 {
     QModelIndex index = sourceModel()->index(sourceRow, 0, sourceParent);
 
     return hasToBeDisplayed(index);
 }
 
 bool ClassFilterProxyModel::displayElement(const QModelIndex index) const
 {
   bool result = false;
     QString type = sourceModel()->data(index, Qt::DisplayRole).toString();
   QStandardItem * item = dynamic_cast<QStandardItemModel*>(sourceModel())->itemFromIndex(index);
 
   if (type.contains(filterRegExp()))
     {
     return true;
     }
     {
     mitk::QtViewItem* viewItem = dynamic_cast<mitk::QtViewItem*>(item);
     if (viewItem)
     {
       for (int i = 0; i < viewItem->m_Tags.size(); ++i)
       {
         if (viewItem->m_Tags[i].contains(filterRegExp()))
         {
           return true;
         }
       }
       if (viewItem->m_Description.contains(filterRegExp()))
       {
         return true;
       }
     }
   }
   {
     mitk::QtPerspectiveItem* viewItem = dynamic_cast<mitk::QtPerspectiveItem*>(item);
     if (viewItem)
     {
       for (int i = 0; i < viewItem->m_Tags.size(); ++i)
       {
         if (viewItem->m_Tags[i].contains(filterRegExp()))
         {
           return true;
         }
       }
       if (viewItem->m_Description.contains(filterRegExp()))
       {
         return true;
       }
     }
   }
   return result;
 }
 
 bool ClassFilterProxyModel::hasToBeDisplayed(const QModelIndex index) const
 {
     bool result = false;
     // How many child this element have
     if ( sourceModel()->rowCount(index) > 0 )
     {
         for( int ii = 0; ii < sourceModel()->rowCount(index); ii++)
         {
             QModelIndex childIndex = sourceModel()->index(ii,0,index);
             if ( ! childIndex.isValid() )
                 break;
             result = hasToBeDisplayed(childIndex);
             result |= displayElement(index);
             if (result)
             {
                 // there is atless one element to display
                 break;
             }
         }
     }
     else
     {
         result = displayElement(index);
     }
     return result;
 }
 
 struct ViewBrowserWindowListener : public berry::IWindowListener
 {
     ViewBrowserWindowListener(QmitkViewBrowserWidget* switcher)
         : switcher(switcher),
           m_Running(false)
     {}
 
     virtual void WindowOpened(berry::IWorkbenchWindow::Pointer /*window*/)
     {
         if (m_Running)
             return;
         m_Running = true;
         switcher->FillTreeList();
         m_Running = false;
     }
 
     virtual void WindowActivated(berry::IWorkbenchWindow::Pointer /*window*/)
     {
         if (m_Running)
             return;
         m_Running = true;
         switcher->FillTreeList();
         m_Running = false;
     }
 
 private:
     QmitkViewBrowserWidget* switcher;
     bool m_Running;
 };
 
 bool compareViews(berry::IViewDescriptor::Pointer a, berry::IViewDescriptor::Pointer b)
 {
     if (a.IsNull() || b.IsNull())
         return false;
     return a->GetLabel().compare(b->GetLabel()) < 0;
 }
 
 bool compareQStandardItems(QStandardItem* a, QStandardItem* b)
 {
     if (a==NULL || b==NULL)
         return false;
     return a->text().compare(b->text()) < 0;
 }
 
 QmitkViewBrowserWidget::QmitkViewBrowserWidget( QWidget * parent, Qt::WindowFlags )
     : QWidget(parent)
 {
     this->CreateQtPartControl(this);
 }
 
 QmitkViewBrowserWidget::~QmitkViewBrowserWidget()
 {
 }
 
 void QmitkViewBrowserWidget::CreateQtPartControl( QWidget *parent )
 {
     // create GUI widgets from the Qt Designer's .ui file
     m_WindowListener = ViewBrowserWindowListener::Pointer(new ViewBrowserWindowListener(this));
     berry::PlatformUI::GetWorkbench()->AddWindowListener(m_WindowListener);
 
     m_Parent = parent;
     m_Controls.setupUi( parent );
     connect( m_Controls.m_PluginTreeView, SIGNAL(customContextMenuRequested(QPoint)), SLOT(CustomMenuRequested(QPoint)));
     connect( m_Controls.m_PluginTreeView, SIGNAL(doubleClicked(const QModelIndex&)), SLOT(ItemClicked(const QModelIndex&)));
     connect( m_Controls.lineEdit, SIGNAL(textChanged(QString)), SLOT(FilterChanged()));
 
     m_ContextMenu = new QMenu(m_Controls.m_PluginTreeView);
     m_Controls.m_PluginTreeView->setContextMenuPolicy(Qt::CustomContextMenu);
 
     // Create a new TreeModel for the data
     m_TreeModel = new QStandardItemModel();
     m_FilterProxyModel = new ClassFilterProxyModel(this);
     m_FilterProxyModel->setSourceModel(m_TreeModel);
     //proxyModel->setFilterFixedString("Diff");
     m_Controls.m_PluginTreeView->setModel(m_FilterProxyModel);
     FillTreeList();
 }
 
 void QmitkViewBrowserWidget::FillTreeList()
 {
     // active workbench window available?
     if (berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow().IsNull())
         return;
     // active page available?
     berry::IWorkbenchPage::Pointer page = berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow()->GetActivePage();
     if (page.IsNull())
         return;
     // everything is fine and we can remove the window listener
     berry::PlatformUI::GetWorkbench()->RemoveWindowListener(m_WindowListener);
 
     // initialize tree model
     m_TreeModel->clear();
     QStandardItem *treeRootItem = m_TreeModel->invisibleRootItem();
 
     // get all available perspectives
     berry::IPerspectiveRegistry* perspRegistry = berry::PlatformUI::GetWorkbench()->GetPerspectiveRegistry();
     std::vector<berry::IPerspectiveDescriptor::Pointer> perspectives(perspRegistry->GetPerspectives());
 
     // get all Keywords
     KeywordRegistry keywordRegistry;
 
     QModelIndex currentIndex;
     berry::IPerspectiveDescriptor::Pointer currentPersp = page->GetPerspective();
     std::vector<std::string> perspectiveExcludeList = berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow()->GetPerspectiveExcludeList();
 
     QStandardItem *perspectiveRootItem = new QStandardItem("Perspectives");
     treeRootItem->appendRow(perspectiveRootItem);
     for (unsigned int i=0; i<perspectives.size(); i++)
     {
         berry::IPerspectiveDescriptor::Pointer p = perspectives.at(i);
 
         bool skipPerspective = false;
         for(unsigned int e=0; e<perspectiveExcludeList.size(); e++)
             if(perspectiveExcludeList.at(e)==p->GetId())
             {
                 skipPerspective = true;
                 break;
             }
         if (skipPerspective)
             continue;
 
         QIcon* pIcon = static_cast<QIcon*>(p->GetImageDescriptor()->CreateImage());
         mitk::QtPerspectiveItem* pItem = new mitk::QtPerspectiveItem(*pIcon, QString::fromStdString(p->GetLabel()));
         pItem->m_Perspective = p;
         pItem->m_Description = QString::fromStdString(p->GetDescription());
         std::vector<std::string> keylist = p->GetKeywordReferences();
         pItem->m_Tags = keywordRegistry.GetKeywords(keylist);
         perspectiveRootItem->appendRow(pItem);
 
         if (currentPersp)
         {
           if (currentPersp->GetId()==p->GetId())
               currentIndex = pItem->index();
         }
     }
 
     // get all available views
     berry::IViewRegistry* viewRegistry = berry::PlatformUI::GetWorkbench()->GetViewRegistry();
     std::vector<berry::IViewDescriptor::Pointer> views(viewRegistry->GetViews());
     std::sort(views.begin(), views.end(), compareViews);
 
     std::vector<std::string> viewExcludeList = berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow()->GetViewExcludeList();
     QStandardItem* viewRootItem = new QStandardItem(QIcon(),"View categories");
     treeRootItem->appendRow(viewRootItem);
 
     std::vector< QStandardItem* > categoryItems;
     QStandardItem* noCategoryItem = new QStandardItem(QIcon(),"Miscellaneous");
 
     for (unsigned int i = 0; i < views.size(); ++i)
     {
         berry::IViewDescriptor::Pointer v = views[i];
 
         bool skipView = false;
         for(unsigned int e=0; e<viewExcludeList.size(); e++)
             if(viewExcludeList.at(e)==v->GetId())
             {
                 skipView = true;
                 break;
             }
         if (skipView)
             continue;
 
         std::vector<std::string> catPath = v->GetCategoryPath();
 
         QIcon* icon = static_cast<QIcon*>(v->GetImageDescriptor()->CreateImage());
         mitk::QtViewItem* vItem = new mitk::QtViewItem(*icon, QString::fromStdString(v->GetLabel()));
         vItem->m_View = v;
         vItem->m_Description = QString::fromStdString(v->GetDescription());
 
         std::vector<std::string> keylist = v->GetKeywordReferences();
         vItem->m_Tags = keywordRegistry.GetKeywords(keylist);
 
         if (catPath.empty())
             noCategoryItem->appendRow(vItem);
         else
         {
             QStandardItem* categoryItem = NULL;
 
             for (unsigned int c=0; c<categoryItems.size(); c++)
                 if (categoryItems.at(c)->text().toStdString() == catPath.front())
                 {
                     categoryItem = categoryItems.at(c);
                     break;
                 }
 
             if (categoryItem==NULL)
             {
                 categoryItem  = new QStandardItem(QIcon(),catPath.front().c_str());
                 categoryItems.push_back(categoryItem);
             }
 
             categoryItem->appendRow(vItem);
         }
     }
     std::sort(categoryItems.begin(), categoryItems.end(), compareQStandardItems);
 
     for (unsigned int i=0; i<categoryItems.size(); i++)
         viewRootItem->appendRow(categoryItems.at(i));
     if (noCategoryItem->hasChildren())
         viewRootItem->appendRow(noCategoryItem);
 
     QModelIndex correctedIndex = m_FilterProxyModel->mapFromSource(currentIndex);
     m_Controls.m_PluginTreeView->setCurrentIndex(correctedIndex);
 }
 
 void QmitkViewBrowserWidget::FilterChanged()
 {
     QString filterString = m_Controls.lineEdit->text();
     if (filterString.size() > 0 )
         m_Controls.m_PluginTreeView->expandAll();
     else
         m_Controls.m_PluginTreeView->collapseAll();
     QRegExp::PatternSyntax syntax = QRegExp::RegExp;
 
     Qt::CaseSensitivity caseSensitivity = Qt::CaseInsensitive;
     QString strPattern = "^*" + filterString;
     QRegExp regExp(strPattern, caseSensitivity);
 
     m_FilterProxyModel->setFilterRegExp(regExp);
 }
 
 void QmitkViewBrowserWidget::ItemClicked(const QModelIndex &index)
 {
     QStandardItem* item = m_TreeModel->itemFromIndex(m_FilterProxyModel->mapToSource(index));
 
     if ( dynamic_cast< mitk::QtPerspectiveItem* >(item) )
     {
         try
         {
             mitk::QtPerspectiveItem* pItem = dynamic_cast< mitk::QtPerspectiveItem* >(item);
             berry::PlatformUI::GetWorkbench()->ShowPerspective( pItem->m_Perspective->GetId(), berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow() );
         }
         catch (...)
         {
             QMessageBox::critical(0, "Opening Perspective Failed", QString("The requested perspective could not be opened.\nSee the log for details."));
         }
     }
     else if ( dynamic_cast< mitk::QtViewItem* >(item) )
     {
         berry::IWorkbenchPage::Pointer page = berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow()->GetActivePage();
 
         if (page.IsNotNull())
         {
             try
             {
                 mitk::QtViewItem* vItem = dynamic_cast< mitk::QtViewItem* >(item);
                 page->ShowView(vItem->m_View->GetId());
             }
             catch (berry::PartInitException e)
             {
                 BERRY_ERROR << "Error: " << e.displayText() << std::endl;
             }
         }
     }
 }
 
 void QmitkViewBrowserWidget::AddPerspective()
 {
     QmitkNewPerspectiveDialog* dialog = new QmitkNewPerspectiveDialog( m_Parent );
 
     int dialogReturnValue = dialog->exec();
     if ( dialogReturnValue == QDialog::Rejected )
         return;
 
     berry::IPerspectiveRegistry* perspRegistry = berry::PlatformUI::GetWorkbench()->GetPerspectiveRegistry();
     try
     {
         berry::IPerspectiveDescriptor::Pointer perspDesc;
         perspDesc = perspRegistry->CreatePerspective(dialog->GetPerspectiveName().toStdString(), perspRegistry->FindPerspectiveWithId(perspRegistry->GetDefaultPerspective()));
         berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow()->GetActivePage()->SetPerspective(perspDesc);
     }
     catch(...)
     {
         QMessageBox::warning(m_Parent, "Error", "Duplication of selected perspective failed. Please make sure the specified perspective name is not already in use!");
     }
     FillTreeList();
 }
 
 void QmitkViewBrowserWidget::ClonePerspective()
 {
     if (m_RegisteredPerspective.IsNotNull())
     {
         QmitkNewPerspectiveDialog* dialog = new QmitkNewPerspectiveDialog( m_Parent );
         QString defaultName(m_RegisteredPerspective->GetLabel().c_str());
         defaultName.append(" Copy");
         dialog->SetPerspectiveName(defaultName);
 
         int dialogReturnValue = dialog->exec();
         if ( dialogReturnValue == QDialog::Rejected )
             return;
 
         berry::IPerspectiveRegistry* perspRegistry = berry::PlatformUI::GetWorkbench()->GetPerspectiveRegistry();
         try
         {
             berry::IPerspectiveDescriptor::Pointer perspDesc = perspRegistry->ClonePerspective(dialog->GetPerspectiveName().toStdString(), dialog->GetPerspectiveName().toStdString(), m_RegisteredPerspective);
             berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow()->GetActivePage()->SetPerspective(perspDesc);
         }
         catch(...)
         {
             QMessageBox::warning(m_Parent, "Error", "Duplication of selected perspective failed. Please make sure the specified perspective name is not already in use!");
         }
         FillTreeList();
     }
 }
 
 void QmitkViewBrowserWidget::ResetPerspective()
 {
     if (QMessageBox::Yes == QMessageBox(QMessageBox::Question, "Please confirm", "Do you really want to reset the curent perspective?", QMessageBox::Yes|QMessageBox::No).exec())
         berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow()->GetActivePage()->ResetPerspective();
 }
 
 void QmitkViewBrowserWidget::DeletePerspective()
 {
     if (m_RegisteredPerspective.IsNotNull())
     {
         QString question = "Do you really want to remove the perspective '";
         question.append(m_RegisteredPerspective->GetLabel().c_str());
         question.append("'?");
         if (QMessageBox::Yes == QMessageBox(QMessageBox::Question, "Please confirm", question, QMessageBox::Yes|QMessageBox::No).exec())
         {
             berry::IPerspectiveRegistry* perspRegistry = berry::PlatformUI::GetWorkbench()->GetPerspectiveRegistry();
             perspRegistry->DeletePerspective(m_RegisteredPerspective);
             berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow()->GetActivePage()->RemovePerspective(m_RegisteredPerspective);
             FillTreeList();
             if (! berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow()->GetActivePage()->GetPerspective())
             {
               berry::IPerspectiveDescriptor::Pointer persp = perspRegistry->FindPerspectiveWithId(perspRegistry->GetDefaultPerspective());
               berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow()->GetActivePage()->SetPerspective(persp);
             }
         }
     }
 }
 
 void QmitkViewBrowserWidget::ClosePerspective()
 {
     if (QMessageBox::Yes == QMessageBox(QMessageBox::Question, "Please confirm", "Do you really want to close the curent perspective?", QMessageBox::Yes|QMessageBox::No).exec())
     {
         berry::IWorkbenchPage::Pointer page = berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow()->GetActivePage();
         page->CloseCurrentPerspective(true, true);
 
         if ( page->GetPerspective().IsNull() )
         {
             berry::IPerspectiveRegistry* perspRegistry = berry::PlatformUI::GetWorkbench()->GetPerspectiveRegistry();
             berry::PlatformUI::GetWorkbench()->ShowPerspective( perspRegistry->GetDefaultPerspective(), berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow() );
         }
     }
 }
 
 void QmitkViewBrowserWidget::ClosePerspectives()
 {
     if (QMessageBox::Yes == QMessageBox(QMessageBox::Question, "Please confirm", "Do you really want to close all perspectives?", QMessageBox::Yes|QMessageBox::No).exec())
     {
         berry::IWorkbenchPage::Pointer page = berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow()->GetActivePage();
         page->CloseAllPerspectives(true, true);
 
         berry::IPerspectiveRegistry* perspRegistry = berry::PlatformUI::GetWorkbench()->GetPerspectiveRegistry();
         berry::PlatformUI::GetWorkbench()->ShowPerspective( perspRegistry->GetDefaultPerspective(), berry::PlatformUI::GetWorkbench()->GetActiveWorkbenchWindow() );
     }
 }
 
 void QmitkViewBrowserWidget::CustomMenuRequested(QPoint pos)
 {
     QModelIndex index = m_Controls.m_PluginTreeView->indexAt(pos);
     QStandardItem* item = m_TreeModel->itemFromIndex(m_FilterProxyModel->mapToSource(index));
 
     if (m_ContextMenu==NULL || item==NULL)
         return;
 
     m_ContextMenu->clear();
     m_RegisteredPerspective = NULL;
 
     bool showMenu = false;
     if (item->text()=="Perspectives")
     {
         QAction* resetAction = new QAction("Reset current perspective", this);
         m_ContextMenu->addAction(resetAction);
         connect(resetAction, SIGNAL(triggered()), SLOT(ResetPerspective()));
 
         QAction* closeAction = new QAction("Close current perspective", this);
         m_ContextMenu->addAction(closeAction);
         connect(closeAction, SIGNAL(triggered()), SLOT(ClosePerspective()));
 
         m_ContextMenu->addSeparator();
 
         QAction* closeAllAction = new QAction("Close all perspectives", this);
         m_ContextMenu->addAction(closeAllAction);
         connect(closeAllAction, SIGNAL(triggered()), SLOT(ClosePerspectives()));
 
         showMenu = true;
     }
     if (dynamic_cast< mitk::QtPerspectiveItem* >(item) )
     {
         m_RegisteredPerspective = dynamic_cast< mitk::QtPerspectiveItem* >(item)->m_Perspective;
 
         //m_ContextMenu->addSeparator();
 
         QAction* cloneAction = new QAction("Duplicate perspective", this);
         m_ContextMenu->addAction(cloneAction);
         connect(cloneAction, SIGNAL(triggered()), SLOT(ClonePerspective()));
 
         if (!m_RegisteredPerspective->IsPredefined())
         {
             QAction* deleteAction = new QAction("Remove perspective", this);
             m_ContextMenu->addAction(deleteAction);
             connect(deleteAction, SIGNAL(triggered()), SLOT(DeletePerspective()));
         }
 
         showMenu = true;
     }
 
     if (showMenu)
         m_ContextMenu->popup(m_Controls.m_PluginTreeView->viewport()->mapToGlobal(pos));
 }
\ No newline at end of file