Bug 189490 [CommonNavigator] Go To->Resource won't enable
I0524 1. Open the Project Explorer in the Resource perspective 2. Create a vanilla project P 3. Create a folder F 4. Create a file resource R Open the Navigate->Go To file. "Resource..." will remain disabled.
bundles/org.eclipse.ui.navigator/src/org/eclipse/ui/navigator/CommonViewer.java
*            content to a particular instance of the Common Navigator
	 * @param aParent
	 *            A Composite parent to contain the actual SWT widget
	 * @param aStyle
	 *            A style mask that will be used to create the TreeViewer
	 *            Composite.
	 */
	public CommonViewer(String aViewerId, Composite aParent, int aStyle) {
		super(aParent, aStyle);
		contentService = new NavigatorContentService(aViewerId, this);
		init();
	}
	/**
	 * <p>
	 * Initializes the content provider, label provider, and drag and drop
	 * support. Should not be called by clients -- this method is invoked when
	 * the constructor is invoked.
	 * </p>
	 */
	protected void init() {
		setUseHashlookup(true);
		setContentProvider(contentService.createCommonContentProvider());
		setLabelProvider(new NavigatorDecoratingLabelProvider(contentService.createCommonLabelProvider()));
		initDragAndDrop();
	}
	protected void removeWithoutRefresh(Object[] elements) {
		super.remove(elements);
	}
	/**
	 * <p>