This tasks integrates the latest developments, presented in T25622.
It will include the latest changes and bugfixes before it will be merged into master as a first open test version.

• solve initialization bugs
• fix known bugs (T25705, T25706)
• perform tests
• build on Linux
• merge into master (currently under review in D175)
• hide from outcry

Important changes:

T25056

• context menu actions removed from the data manager view
  • data manager now uses the QmitkDataNodeContextMenu from 'org.mitk.gui.qt.application'
  • hotkeys preference page uses the global actions - data manager does not contain any actions anymore
• moved OpenRenderWindowPart from the data manager to the workbenchutil:
• moved implementation of GetRenderWindowPart (with IRenderWindowPartStrategy) from the abstract view to the workbenchutil
  • possible migration conflict: views that rely on the QmitkAbstractView to provide IRenderWindowPartStrategy values now need to access the workbenchutil
  • => e.g. inside the QmitkSegmentationView: GetRenderWindowPart(OPEN) becomes GetRenderWindowPart(mitk::WorkbenchUtil::OPEN)
• moved QmitkInfoDialog from the data manager plugin to 'org.mitk.gui.qt.application'
• moved mitkIContextMenuAction from the data manager plugin to 'org.mitk.gui.qt.application'

T23758

• set the default org.blueberry.ui.editors of QmitkStdMultiWidgetEditor to false
• added QmitkCustomMultiWidget to the QtWidgets module
• added QmitkRenderWindowWidget.cpp to the QtWidgets module
• added org.mitk.gui.qt.custommultiwidgeteditor plugin
• added QmitkMultiWidgetConfigurationToolBar to the QtWidgets module
• added QmitkInteractionSchemeToolBar to the QtWidgets module
• added QmitkMultiWidgetLayoutSelectionWidget to the QtWidgets module
• added actions (with icons) in org.mitk.gui.qt.ext plugin
  • QmitkOpenCustomMultiWidgetEditorAction
  • QmitkOpenStdMultiWidgetEditorAction
• added QmitkViewCoordinator::PartInputChanged
• added IRenderWindowPartListener::RenderWindowPartInputChanged
• refactored DisplayInteraction concept (Core changes)
  • added mitkDisplayActionEventBroadcast to the Core module
  • added mitkDisplayActionEventFunctions to the Core module
  • added mitkDisplayActionEvents to the Core module
  • added mitkDisplayActionEventHandler to the Core module
  • added mitkStdDisplayActionEventHandler to the Core module
  • added mitkInteractionSchemeSwitcher to the Core module
  • move GetTopLayerNode from mitkDisplayInteractor, QmitkImageNavigatorView and QmitkStdMultiWidget to the data storage and call it FindTopmostVisibleNode

T25601

• mitkImageVtkMapper2D: made "LookupTable" property base renderer aware
• added QmitkAbstractDataNodeAction and subclasses to org.mitk.gui.qt.application
• added QmitkDataNodeContextMenu to org.mitk.gui.qt.application
• changed QmitkDataNodeManagerView to use the new QmitkDataNodeContextMenu
• remove all actions from the QmitkDataNodeManagerView
• moved adding actions to node descriptors from the QmitkDataNodeManagerView to the QmitkDataNodeContextMenu