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
}
	
	protected abstract IField[] getSortingFields();
	protected abstract IField[] getVisibleFields();
	protected abstract IDialogSettings getDialogSettings();
	/**
	 * Return the viewer.
	 * 
	 * @return TreeViewer
	 */
	protected TreeViewer getViewer() {
		return viewer;
	}
	/**
	 * Return the tree for the receiver.
	 * 
	 * @return Tree
	 */
	protected Tree getTree() {
		return getViewer().getTree();
	}
	protected SelectionListener getHeaderListener() {
		return new SelectionAdapter() {
			/**
			 * Handles the case of user selecting the header area.
			 */
			public void widgetSelected(SelectionEvent e) {
				TableSorter sorter = (TableSorter) viewer.getSorter();
				int column = getViewer().getTree().indexOf(
						(TreeColumn) e.widget);