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
* Adds DND support to the Navigator. Uses hooks into the extensible
	 * framework for DND.
	 * </p>
	 * <p>
	 * By default, the following Transfer types are supported:
	 * <ul>
	 * <li>LocalSelectionTransfer.getInstance(),
	 * <li>PluginTransfer.getInstance()
	 * </ul>
	 * </p>
	 * 
	 * @see CommonDragAdapter
	 * @see CommonDropAdapter
	 */
	protected void initDragAndDrop() {
		
		int operations = DND.DROP_COPY | DND.DROP_MOVE;
		CommonDragAdapter dragAdapter = new CommonDragAdapter(contentService,
				this);
		addDragSupport(operations, dragAdapter.getSupportedDragTransfers(),
				dragAdapter);
		CommonDropAdapter dropAdapter = new CommonDropAdapter(contentService,
				this);
		addDropSupport(operations, dropAdapter.getSupportedDropTransfers(),
				dropAdapter);
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.viewers.AbstractTreeViewer#createTreeItem(org.eclipse.swt.widgets.Widget,