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/internal/navigator/NavigatorContentService.java
try {
				NavigatorContentDescriptor key;
				NavigatorContentExtension extension;
				for (Iterator iter = contentExtensions.keySet().iterator(); iter
						.hasNext();) {
					key = (NavigatorContentDescriptor) iter.next();
					INavigatorActivationService activation = getActivationService();
					if (!activation.isNavigatorExtensionActive(key.getId())) {
						extension = (NavigatorContentExtension) contentExtensions
								.get(key);
						iter.remove();
						/*
						 * There really shouldn't be any way that this can be
						 * null, but just to be safe
						 */
						if (extension != null) {
							extension.dispose();
						}
					}
				}
			} catch (RuntimeException e) {
				String msg = e.getMessage() != null ? e.getMessage() : e
						.toString();
				NavigatorPlugin.logError(0, msg, e);
			}
		}
		update();
	}
	/*
	 * (non-Javadoc)