Bug 16897 No busy indicator while populating type hierarchy
Build: Freeze 1 In a self-hosting workspace, select the type IAdaptable in an editor and hit F4 to populate the type hiearchy. Since this interface has many sub-types, this takes several seconds to populate. There should be a busy indicator while this is happening.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/TypeHierarchyViewPart.java
trackedViewers[nHierarchyViewers]= fMethodsViewer;
		fSelectionProviderMediator= new SelectionProviderMediator(trackedViewers);
		IStatusLineManager slManager= getViewSite().getActionBars().getStatusLineManager();
		fSelectionProviderMediator.addSelectionChangedListener(new StatusBarUpdater(slManager));
		
		getSite().setSelectionProvider(fSelectionProviderMediator);
		getSite().getPage().addPartListener(fPartListener);
		
		IJavaElement input= determineInputElement();
		if (fMemento != null) {
			restoreState(fMemento, input);
		} else if (input != null) {
			setInputElement(input);
		} else {
			setViewerVisibility(false);
		}
		WorkbenchHelp.setHelp(fPagebook, IJavaHelpContextIds.TYPE_HIERARCHY_VIEW);
		
		fActionGroups= new CompositeActionGroup(new ActionGroup[] {
				new OpenEditorActionGroup(this), 
				new OpenViewActionGroup(this), 
				new ShowActionGroup(this), 
				fCCPActionGroup= new CCPActionGroup(this), 
				new RefactorActionGroup(this),
				new GenerateActionGroup(this),
				new JavaSearchActionGroup(this)});
		
		fActionGroups.fillActionBars(getViewSite().getActionBars());
		
		initDragAndDrop();