Bug 189393 Can not drop the item into cross table row
Description: Can not drop the item into cross table row Step: 1. New a cross table. 2. Drop any item from palette into cross table row. Actual result: The item cannot drop in it.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/schematic/tools/ReportCreationTool.java
/**
	 * Selects or clicks added object
	 * 
	 * @param model
	 *            new object, null will do nothing
	 * @param viewer
	 *            edit part viewer, null will do nothing
	 * @param request
	 *            the request sended to EditPart
	 */
	public static void selectAddedObject( final Object model,
			final EditPartViewer viewer, final Request request )
	{
		if ( model == null || viewer == null )
			return;
		Display.getCurrent( ).asyncExec( new Runnable( ) {
			public void run( )
			{
				
				Object editpart = viewer.getEditPartRegistry( ).get( model );
				if ( editpart instanceof EditPart )
				{
					viewer.flush( );
					viewer.select( (EditPart) editpart );
				}
				else
				{
					return;
				}
				if ( ( (EditPart) editpart ).understandsRequest( request ) )