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
fHierarchyLifeCycle.removeChangedListener(fTypeHierarchyLifeCycleListener);
		fPaneLabelProvider.dispose();
		getSite().getPage().removePartListener(fPartListener);
		if (fActionGroups != null)
			fActionGroups.dispose();
		super.dispose();
	}
			
	private Control createTypeViewerControl(Composite parent) {
		fViewerbook= new PageBook(parent, SWT.NULL);
				
		KeyListener keyListener= createKeyListener();
						
		
		TypeHierarchyViewer superTypesViewer= new SuperTypeHierarchyViewer(fViewerbook, fHierarchyLifeCycle, this);
		initializeTypesViewer(superTypesViewer, keyListener, IContextMenuConstants.TARGET_ID_SUPERTYPES_VIEW);
		
		TypeHierarchyViewer subTypesViewer= new SubTypeHierarchyViewer(fViewerbook, fHierarchyLifeCycle, this);
		initializeTypesViewer(subTypesViewer, keyListener, IContextMenuConstants.TARGET_ID_SUBTYPES_VIEW);
		
		TypeHierarchyViewer vajViewer= new TraditionalHierarchyViewer(fViewerbook, fHierarchyLifeCycle, this);
		initializeTypesViewer(vajViewer, keyListener, IContextMenuConstants.TARGET_ID_HIERARCHY_VIEW);
		fAllViewers= new TypeHierarchyViewer[3];
		fAllViewers[VIEW_ID_SUPER]= superTypesViewer;
		fAllViewers[VIEW_ID_SUB]= subTypesViewer;
		fAllViewers[VIEW_ID_TYPE]= vajViewer;
		
		int currViewerIndex;
		try {
			currViewerIndex= fDialogSettings.getInt(DIALOGSTORE_HIERARCHYVIEW);