Bug 94456 [Undo] - Resource Navigator not showing workspace undo actions
The Resource Navigator is not showing the workspace undo actions. Package Explorer is correctly working. Need to look at the difference in the way the action handlers are set up.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/navigator/MainActionGroup.java
protected AddBookmarkAction addBookmarkAction;
    protected AddTaskAction addTaskAction;
    protected PropertyDialogAction propertyDialogAction;
    protected ImportResourcesAction importAction;
    protected ExportResourcesAction exportAction;
    protected CollapseAllAction collapseAllAction;
    protected ToggleLinkingAction toggleLinkingAction;
    protected GotoActionGroup gotoGroup;
    protected OpenActionGroup openGroup;
    protected RefactorActionGroup refactorGroup;
    protected WorkingSetFilterActionGroup workingSetGroup;
    protected SortAndFilterActionGroup sortAndFilterGroup;
    protected WorkspaceActionGroup workspaceGroup;
    private IResourceChangeListener resourceChangeListener;