Bug 193828 message should not be popped when adding group level to cross tab
In a cross tab click on an aggregation type data cell and select 'show/hide Group Levels'. If I want to add a level, A message dialog pops up. Expected: No message dialog should pop up when adding a level. The dialog should appear only when a level in unchecked.
xtab/org.eclipse.birt.report.item.crosstab.ui/src/org/eclipse/birt/report/item/crosstab/internal/ui/editors/action/AddLevelHandleAction.java
* Constructor
	 * 
	 * @param handle
	 */
	public AddLevelHandleAction( DesignElementHandle handle )
	{
		super( handle );
		setId( ID );
		setText( TEXT );
		ExtendedItemHandle extendedHandle =CrosstabAdaptUtil. getExtendedItemHandle( handle );
		setHandle( extendedHandle );
		viewHandle = CrosstabAdaptUtil.getDimensionViewHandle( extendedHandle );
		
		Image image = CrosstabUIHelper.getImage( CrosstabUIHelper.SHOW_HIDE_LECEL );
		setImageDescriptor( ImageDescriptor.createFromImage( image ) );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.jface.action.Action#run()
	 */
	public void run( )
	{
		transStar( NAME );
		try
		{
			LevelViewDialog dialog = new LevelViewDialog(UIUtil.getDefaultShell( ));
			List showLevels = new ArrayList();
			List nullLevelHandle = new ArrayList();
			int viewCount = viewHandle.getLevelCount( );