Avoid warnings about unchecked casts

...g.base.ui/src/org/fortiss/tooling/base/ui/editor/.ratings

...rtiss/tooling/base/ui/editor/CommonDiagramEditorBase.java

...src/org/fortiss/tooling/base/ui/editor/GEFEditorBase.java

...rc/org/fortiss/tooling/kernel/ui/internal/editor/.ratings

.../kernel/ui/internal/editor/ExtendableMultiPageEditor.java

...ng/kernel/ui/internal/editor/ModelElementEditorInput.java

.../kernel/ui/internal/editor/TutorialStepUIEditorInput.java

...rg/fortiss/tooling/kernel/ui/internal/properties/.ratings

...rnel/ui/internal/properties/PropertiesAdapterFactory.java

...src/org/fortiss/tooling/kernel/ui/internal/views/.ratings

...s/tooling/kernel/ui/internal/views/NavigatorViewPart.java

...el/src/org/fortiss/tooling/kernel/extension/base/.ratings

...ooling/kernel/extension/base/ConstraintViolationBase.java