Bug 294303 [Markers] 'Queuing Viewer Updates' in Problems view
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/ExtendedMarkersView.java
viewer.getTree().addTreeListener(new TreeAdapter() {
			/*
			 * (non-Javadoc)
			 * 
			 * @see
			 * org.eclipse.swt.events.TreeAdapter#treeCollapsed(org.eclipse.
			 * swt.events.TreeEvent)
			 */
			public void treeCollapsed(TreeEvent e) {
				removeExpandedCategory((MarkerCategory) e.item.getData());
			}
			/*
			 * (non-Javadoc)
			 * 
			 * @see
			 * org.eclipse.swt.events.TreeAdapter#treeExpanded(org.eclipse.swt
			 * .events.TreeEvent)
			 */
			public void treeExpanded(TreeEvent e) {
				addExpandedCategory((MarkerCategory) e.item.getData());
			}
		});
	}
	/**
	 * 
	 */
	private void addLinkWithEditorSupport() {
		new OpenAndLinkWithEditorHelper(viewer) {
			/*
			 * (non-Javadoc)