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/BookmarkView.java
return true;
		}
		public void modify(Object element, String property, Object value) {
			if (element instanceof Item) {
				Item item = (Item) element;
				Object data = item.getData();
				if (data instanceof ConcreteMarker) {
					IMarker marker = ((ConcreteMarker) data).getMarker();
					try {
						if (!marker.getAttribute(property).equals(value)) {
							if (IMarker.MESSAGE.equals(property))
								marker.setAttribute(IMarker.MESSAGE, value);
						}
					} catch (CoreException e) {
						ErrorDialog
								.openError(
										getSite().getShell(),
										MarkerMessages.errorModifyingBookmark, null, e.getStatus()); 
					}
				}
			}
		}
	};
	private CellEditorActionHandler cellEditorActionHandler;
	public void createPartControl(Composite parent) {
		super.createPartControl(parent);
		
		TreeViewer treeViewer = getViewer();
		CellEditor cellEditors[] = new CellEditor[treeViewer.getTree()
				.getColumnCount()];