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/workingsets/WorkingSetsLabelProvider.java
private WorkbenchLabelProvider labelProvider = new WorkbenchLabelProvider();
	public Image getImage(Object element) {
		if (element instanceof IWorkingSet)
			return labelProvider.getImage(element);
		return null;
	}
	public String getText(Object element) {
		if (element instanceof IWorkingSet)
			return ((IWorkingSet) element).getLabel();
		return null;
	}
	public void addListener(ILabelProviderListener listener) {
		
	}
	public void dispose() {
		
	}
	public boolean isLabelProperty(Object element, String property) {
		
		return false;
	}
	public void removeListener(ILabelProviderListener listener) {
		
	}
}