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/TaskView.java
treeViewer.setColumnProperties(TABLE_COLUMN_PROPERTIES);
		cellEditorActionHandler = new CellEditorActionHandler(getViewSite()
				.getActionBars());
		cellEditorActionHandler.addCellEditor(descriptionCellEditor);
		cellEditorActionHandler.setCopyAction(copyAction);
		cellEditorActionHandler.setPasteAction(pasteAction);
		cellEditorActionHandler.setDeleteAction(deleteAction);
		cellEditorActionHandler.setSelectAllAction(selectAllAction);
	}
	public void dispose() {
		if (cellEditorActionHandler != null)
			cellEditorActionHandler.dispose();
		if (markCompletedAction != null)
			markCompletedAction.dispose();
		super.dispose();
	}
	protected ColumnPixelData[] getDefaultColumnLayouts() {
		return DEFAULT_COLUMN_LAYOUTS;
	}
	protected IDialogSettings getDialogSettings() {
		AbstractUIPlugin plugin = (AbstractUIPlugin) Platform
				.getPlugin(PlatformUI.PLUGIN_ID);
		IDialogSettings workbenchSettings = plugin.getDialogSettings();
		IDialogSettings settings = workbenchSettings
				.getSection(TAG_DIALOG_SECTION);
		if (settings == null)
			settings = workbenchSettings.addNewSection(TAG_DIALOG_SECTION);
		return settings;
	}
	protected void createActions() {