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/ResourceNavigator.java
*/
    public void updateTitle() {
        Object input = getViewer().getInput();
        IWorkspace workspace = ResourcesPlugin.getWorkspace();
        IWorkingSet workingSet = workingSetFilter.getWorkingSet();
        if (input == null || input.equals(workspace)
                || input.equals(workspace.getRoot())) {
            setContentDescription(""); 
            if (workingSet != null) {
                setTitleToolTip(NLS.bind(ResourceNavigatorMessages.ResourceNavigator_workingSetToolTip, workingSet.getName()));
            } else {
                setTitleToolTip(""); 
            }
        } else {
            ILabelProvider labelProvider = (ILabelProvider) getTreeViewer()
                    .getLabelProvider();
            String inputToolTip = getFrameToolTipText(input);
            String text = labelProvider.getText(input);
            if(text != null)
            	setContentDescription(text);
            if (workingSet != null) {
                setTitleToolTip(NLS.bind(ResourceNavigatorMessages.ResourceNavigator_workingSetInputToolTip, inputToolTip, workingSet.getName()));
            } else {
                setTitleToolTip(inputToolTip);
            }
        }
    }
    /**
     * Returns the action group.
     *