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
* Extends the superclass implementation to set the context in the subgroups.
     */
    public void setContext(ActionContext context) {
        super.setContext(context);
        gotoGroup.setContext(context);
        openGroup.setContext(context);
        refactorGroup.setContext(context);
        sortAndFilterGroup.setContext(context);
        workspaceGroup.setContext(context);
    }
    /**
     * Fills the context menu with the actions contained in this group
     * and its subgroups.
     * 
     * @param menu the context menu
     */
    public void fillContextMenu(IMenuManager menu) {
        IStructuredSelection selection = (IStructuredSelection) getContext()
                .getSelection();
        MenuManager newMenu = new MenuManager(ResourceNavigatorMessages.ResourceNavigator_new);
        menu.add(newMenu);
        newMenu.add(newWizardMenu);
        gotoGroup.fillContextMenu(menu);
        openGroup.fillContextMenu(menu);
        menu.add(new Separator());
        refactorGroup.fillContextMenu(menu);
        menu.add(new Separator());
        menu.add(importAction);
        menu.add(exportAction);
        importAction.selectionChanged(selection);