implemented close editors on delete feature

...tooling/kernel/ui/internal/ModelEditorBindingService.java

.../fortiss/tooling/kernel/ui/internal/NavigatorService.java

...tooling/kernel/ui/service/IModelEditorBindingService.java

...rtiss/tooling/kernel/extension/data/ITopLevelElement.java

.../fortiss/tooling/kernel/internal/CommandStackService.java

...tooling/kernel/internal/storage/eclipse/ModelContext.java

.../fortiss/tooling/kernel/service/ICommandStackService.java

...c/org/fortiss/tooling/kernel/utils/ModelElementUtils.java