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`
- `QmitkPointListView`
- `QmitkFiducialRegistrationWidget`
Additionally some StdMultiWidget-includes are unnecessary.