Bug 137148 [Markers] Contributions to IMarker no longer show up on elements in the Problems View
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/TableView.java
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) {