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.resources/src/org/eclipse/ui/internal/navigator/resources/plugin/WorkbenchNavigatorPlugin.java
private static WorkbenchNavigatorPlugin plugin;
	
	public static String PLUGIN_ID = "org.eclipse.ui.navigator.resources"; 
	/**
	 * Creates a new instance of the receiver
	 */
	public WorkbenchNavigatorPlugin() {
		super();
		plugin = this;
	}
	/**
	 * @return the shared instance.
	 */
	public static WorkbenchNavigatorPlugin getDefault() {
		return plugin;
	}
	/**
	 * @return the workspace instance.
	 */
	public static IWorkspace getWorkspace() {