Bug 28575 Hierarchy view updates items twice [type hierarchy]
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/TypeHierarchyViewPart.java
menu.add(fFocusOnTypeAction);
		fNoHierarchyShownLabel.setMenu(menu.createContextMenu(fNoHierarchyShownLabel));
		
		fPagebook.showPage(fNoHierarchyShownLabel);
		int orientation;
		try {
			orientation= fDialogSettings.getInt(DIALOGSTORE_VIEWORIENTATION);
			if (orientation < 0 || orientation > 2) {
				orientation= VIEW_ORIENTATION_VERTICAL;
			}
		} catch (NumberFormatException e) {
			orientation= VIEW_ORIENTATION_VERTICAL;
		}
		
		fCurrentOrientation= -1;
		
		setOrientation(orientation);
		
		
		IActionBars actionBars= getViewSite().getActionBars();
		IMenuManager viewMenu= actionBars.getMenuManager();
		for (int i= 0; i < fToggleOrientationActions.length; i++) {
			viewMenu.add(fToggleOrientationActions[i]);
		}
		viewMenu.add(new Separator(IWorkbenchActionConstants.MB_ADDITIONS));
		viewMenu.add(fShowQualifiedTypeNamesAction);
		
	
		
		ToolBarManager lowertbmanager= new ToolBarManager(methodViewerToolBar);