Bug 7591 Flicker when toggeling show inherited filter
When toggeling the show inherited filter in the type hierarchy you can watch the scrollbar grow. We should bracket this refresh with setRedraw(false/true) so that there is only a single refresh.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/MethodsViewer.java
new JavaSearchGroup(), new GenerateGroup()
		};
		
		setSorter(new MethodsViewerSorter());
	}
	
	/**
	 * Show inherited methods
	 */
	public void showInheritedMethods(boolean on) {
		MethodsContentProvider cprovider= (MethodsContentProvider) getContentProvider();
		try {
			cprovider.showInheritedMethods(on);
			fShowInheritedMembersAction.setChecked(on);
			
			JavaElementLabelProvider lprovider= (JavaElementLabelProvider) getLabelProvider();
			if (on) {
				lprovider.turnOn(JavaElementLabelProvider.SHOW_POST_QUALIFIED);
			} else {
				lprovider.turnOff(JavaElementLabelProvider.SHOW_POST_QUALIFIED);
			}
			refresh();
			
		} catch (JavaModelException e) {
			ExceptionHandler.handle(e, getControl().getShell(), TypeHierarchyMessages.getString("MethodsViewer.toggle.error.title"), TypeHierarchyMessages.getString("MethodsViewer.toggle.error.message")); 
		}
	}
		
	/*
	 * @see Viewer#inputChanged(Object, Object)