Fix comments, refactor, clean code
Summary:
Integrated old branch into develop with latest changes of the plugin.
Main refactoring affects
- new Qt signal-slot syntax
- removing / rearranging includes
- including QmitkDataStorageListInspector and QmitkDataStorageTreeInspector in QmitkDataStorageViewerTestView
- fixing comments
Merge remote-tracking branch 'origin/T25753-Refactor-selection-concept-classes' into T25753-Develop-integration
Test Plan: manual GUI test
Reviewers: floca, O1 MITK Reviewer Group I, O3 MITK Reviewer Group II
Reviewed By: floca, O1 MITK Reviewer Group I, O3 MITK Reviewer Group II
Subscribers: floca, kalali
Maniphest Tasks: T25753
Differential Revision: https://phabricator.mitk.org/D326