Bug 34769 [Navigator] F2/F5 actions not enabled/disabled properly when closing/opening project
bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/navigator/GotoActionGroup.java
private BackAction backAction;
	private ForwardAction forwardAction;
	private GoIntoAction goIntoAction;
	private UpAction upAction;
	private GotoResourceAction goToResourceAction;
	private IResourceChangeListener resourceChangeListener;
	
	public GotoActionGroup(IResourceNavigator navigator) {
		super(navigator);