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
*      java.lang.Object, int)
	 */
	protected void createTreeItem(Widget parent, final Object element, int index) {
		try {
			super.createTreeItem(parent, element, index);
		} catch (Exception ex) {
			ex.printStackTrace();
		} catch (Error e) {
			e.printStackTrace();
		}
	}
	/*
	 * @see ContentViewer#handleLabelProviderChanged(LabelProviderChangedEvent)
	 */
	protected void handleLabelProviderChanged(LabelProviderChangedEvent event) {
		Object[] changed = event.getElements();
		if (changed != null) {
			List others = Arrays.asList(changed);
			for (Iterator iter = others.iterator(); iter.hasNext();) {
				if(iter.next() == null)
					iter.remove(); 
			} 
			if (others.isEmpty()) {
				return;
			}
			event = new LabelProviderChangedEvent((IBaseLabelProvider) event
					.getSource(), others.toArray());
		}
		super.handleLabelProviderChanged(event);
	}