Bug 19974 Packages view: back / forward buttons do not show frame name [package explorer]
Build 20020611 In packages view, - select a container - Navigate / Go Into - hover over Back button - it says simply "Back" It should say "Back to Workspace". Compare with Navigator.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/packageview/PackageExplorerPart.java
* isn't a package explorer part registered <code>null</code> is returned.
	 * Otherwise the opened view part is returned.
	 */
	public static PackageExplorerPart openInActivePerspective() {
		try {
			return (PackageExplorerPart)JavaPlugin.getActivePage().showView(VIEW_ID);
		} catch(PartInitException pe) {
			return null;
		}
	} 
		
	 public void dispose() {
		if (fContextMenu != null && !fContextMenu.isDisposed())
			fContextMenu.dispose();
		getSite().getPage().removePartListener(fPartListener);
		JavaPlugin.getDefault().getPreferenceStore().removePropertyChangeListener(this);
		if (fViewer != null)
			fViewer.removeTreeListener(fExpansionListener);
		
		if (fActionSet != null)	
			fActionSet.dispose();
		super.dispose();	
	}
	/**
	 * Implementation of IWorkbenchPart.createPartControl(Composite)
	 */
	public void createPartControl(Composite parent) {
		
		fViewer= createViewer(parent);
		fViewer.setUseHashlookup(true);