Bug 10236 Enable decorators in Type hierarchy view
See the packages view for how to do this.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/typehierarchy/MethodsViewer.java
ScrollBar bar= getTable().getVerticalBar();
		if (bar != null) {
			Integer vScroll= memento.getInteger(TAG_VERTICAL_SCROLL);
			if (vScroll != null) {
				bar.setSelection(vScroll.intValue());
			}
		}
	}
	
	/**
	 * Attaches a contextmenu listener to the table
	 */
	public void initContextMenu(IMenuListener menuListener, String popupId, IWorkbenchPartSite viewSite) {
		MenuManager menuMgr= new MenuManager();
		menuMgr.setRemoveAllWhenShown(true);
		menuMgr.addMenuListener(menuListener);
		Menu menu= menuMgr.createContextMenu(getTable());
		getTable().setMenu(menu);
		viewSite.registerContextMenu(popupId, menuMgr, this);
	}	
		
	
	/**
	 * Fills up the context menu with items for the method viewer
	 * Should be called by the creator of the context menu
	 */	
	public void contributeToContextMenu(IMenuManager menu) {
		if (fOpen.canActionBeAdded()) {
			menu.appendToGroup(IContextMenuConstants.GROUP_OPEN, fOpen);
		}