The new QmitkAbstractMultiWidget(Editor) serves as a base class for the two multi widgets (editors): `QmitkStdMultiWidget(Editor)` and `MxNMultiWidget(Editor)`
In order to make both variants work all occurrences of the `StdMultiWidget(Editor)` have to be checked and potentially replaced with a `QmitkAbstractMultiWidget(Editor)`.
Candidates are:
- ~~`QmitkAdaptiveRegionGrowingToolGUI`~~
- `QmitkPointListWidget`
- ~~`QmitkPointListViewWidget`~~ --> removed in T26547 / D661
- `QmitkPointListView`
- `QmitkFiducialRegistrationWidget`
- `QmitkIGTTrackingDataEvaluationView` and `QmitkIGTTrackingSemiAutomaticMeasurementView`
- still dependent on `QmitkFunctionality` (see {T29200}).
Additionally some StdMultiWidget-includes are unnecessary.