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 items != null
					&& items.length > 1
					&& target != null
					&& ( target instanceof DesignElementHandle || target instanceof ListBandProxy );
		}
		/**
		 * 
		 * Returns multiple insert positions in form of array
		 */
		public Object getInsertPosition( )
		{
			Object[] positions = new Object[items.length];
			if ( target instanceof CellHandle )
			{
				CellHandle firstCell = (CellHandle) target;
				TableHandleAdapter tableAdapter = HandleAdapterFactory.getInstance( )
						.getTableHandleAdapter( getTableHandle( firstCell ) );
				int currentColumn = HandleAdapterFactory.getInstance( )
						.getCellHandleAdapter( firstCell )
						.getColumnNumber( );
				int currentRow = HandleAdapterFactory.getInstance( )
						.getCellHandleAdapter( firstCell )
						.getRowNumber( );
				int columnDiff = currentColumn
						+ items.length
						- tableAdapter.getColumnCount( )
						- 1;
				
				if ( columnDiff > 0 )
				{