Bug 191089 cross tab Binding tab- Aggregate On field is shows incorrect field name
Cross tab-Binding under properties hows incorrect field for 'Aggregate On'. It show show similar to regular table binding 'Aggregate On' field. For example; instead of Location/country it should show either 'N/A' for table or 'Group Country' for any group.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
{
		if ( input instanceof GroupElementHandle )
		{
			return ( (GroupElementHandle) input ).getElements( ).get( 0 );
		}
		else if ( input instanceof List )
		{
			return ( (List) input ).get( 0 );
		}
		else
			return input;
	}
	public static Object getInputFirstElement( Object input, boolean notSame )
	{
		if ( input instanceof GroupElementHandle )
		{
			if ( notSame && ( (GroupElementHandle) input ).isSameType( ) )
				return null;
			return ( (GroupElementHandle) input ).getElements( ).get( 0 );
		}
		else if ( input instanceof List )
		{
			GroupElementHandle group = DEUtil.getGroupElementHandle( (List) input );
			if ( notSame && group != null && group.isSameType( ) )
				return null;
			return ( (List) input ).get( 0 );
		}
		else
			return input;
	}