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
if (column == sorter.getTopPriority())
					sorter.reverseTopPriority();
				else {
					sorter.setTopPriority(column);
				}
				viewer.refresh();
			}
		};
	}
	protected abstract ColumnPixelData[] getDefaultColumnLayouts();
	/**
	 * Return a sort dialog for the receiver.
	 * @return TableSortDialog
	 */
	protected TableSortDialog getSortDialog() {
		return new TableSortDialog(getSite(),(TableSorter) viewer.getSorter());
		
	}
	protected abstract void handleKeyPressed(KeyEvent event);
	protected abstract void handleOpenEvent(OpenEvent event);
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.part.ViewPart#saveState(org.eclipse.ui.IMemento)
	 */
	public void saveState(IMemento memento) {
		super.saveState(memento);
		ColumnPixelData[] data = getColumnData();
		for (int i = 0; i < data.length; i++) {
			ColumnPixelData data2 = data[i];