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
private static final String TAG_COLUMN_WIDTH = "columnWidth"; 
	private static final String TAG_VERTICAL_POSITION = "verticalPosition"; 
	private static final String TAG_HORIZONTAL_POSITION = "horizontalPosition"; 
	private TreeViewer viewer;
	private IMemento memento;
	private IAction sortAction;
	private IAction filtersAction;
	private IAction preferencesAction;
	private MarkerTreeContentProvider contentProvider;
	/*
	 * (non-Javadoc) Method declared on IViewPart.