Bug 114615 [Markers] No feedback for 'Completed' tasks
There's not longer any 'check box' indicator on the Tasks View so clients can't determine whether a task has been completed or not... This is a regression...
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/TableView.java
mgr.addMenuListener(new IMenuListener() {
			public void menuAboutToShow(IMenuManager mgr) {
				getViewer().cancelEditing();
				fillContextMenu(mgr);
			}
		});
		return mgr;
	}
	protected abstract void initToolBar(IToolBarManager tbm);
	/**
	 * Init the menu for the receiver.
	 * 
	 * @param menu
	 */
	protected void initMenu(IMenuManager menu) {
		if (sortAction != null)
			menu.add(sortAction);
		addDropDownContributions(menu);
		if (filtersAction != null)
			menu.add(filtersAction);
		if (preferencesAction != null)
			menu.add(preferencesAction);
	}
	/**
	 * Add any extra contributions to the drop down.
	 * 
	 * @param menu
	 */
	void addDropDownContributions(IMenuManager menu) {