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
{
			return false;
		}
		if ( insertObj instanceof Object[] )
		{
			Object[] array = (Object[]) insertObj;
			if ( !checkSameDataSetInMultiColumns( array ) )
			{
				return false;
			}
			for ( int i = 0; i < array.length; i++ )
			{
				if ( !handleValidateInsertToLayout( array[i], targetPart ) )
				{
					return false;
				}
			}
			return true;
		}
		else if ( insertObj instanceof IStructuredSelection )
		{
			return handleValidateInsertToLayout( ( (IStructuredSelection) insertObj ).toArray( ),
					targetPart );
		}
		else if ( insertObj instanceof DataSetHandle )
		{
			if ( insertObj instanceof JointDataSetHandle )
				return isHandleValid( (DataSetHandle) insertObj )
						&& handleValidateDataSet( targetPart );
			else