Bug 136045 the display name does not work
Description: the display name does not work Steps to reproduce: 1. new a datasource and a dataset 2. In the window 'Edit dataset'. click the tab 'Output columns' 3. set a display name on a column Actual result: The display name does not work, however, it is still the column name
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dnd/InsertInLayoutUtil.java
}
	/**
	 * Validates drop target from data set column in data view.
	 * 
	 * @return validate result
	 */
	protected static boolean handleValidateDataSetColumn(
			ResultSetColumnHandle insertObj, EditPart target )
	{
		if ( handleValidateDataSetColumnDropContainer( target )
				&& DNDUtil.handleValidateTargetCanContainType( target.getModel( ),
						ReportDesignConstants.DATA_ITEM ) )
		{
			
			if ( target.getModel( ) instanceof ModuleHandle )
			{
				return true;
			}
			
			DesignElementHandle handle = (DesignElementHandle) target.getParent( )
					.getModel( );
			if ( handle instanceof ReportItemHandle
					&& ( (ReportItemHandle) handle ).getDataSet( ) == null )
			{
				return true;
			}
			return DEUtil.getDataSetList( handle )
					.contains( insertObj.getElementHandle( ) );
		}
		return false;