fixed the new menu contribution

org.fortiss.tooling.kernel/trunk/META-INF/MANIFEST.MF

org.fortiss.tooling.kernel/trunk/plugin.xml

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

...oling/kernel/internal/compose/ProjectSpaceCompositor.java

...nel/internal/handler/ProjectSpaceModelElementHandler.java

...rnel/internal/navigator/NavigatorTreeContentProvider.java

.../tooling/kernel/internal/navigator/NavigatorViewPart.java

...rg/fortiss/tooling/kernel/internal/navigator/NewMenu.java

...fortiss/tooling/kernel/services/ICommandStackService.java