Bug 26823 [Markers] cannot reorder columns in task list
-cannot reorder columns in task list -should allow for custom columns content (line number only, line in method, in file) -should allow to wrap text in a higher row for long error message: we keep adjusting the columns width all the time...
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