Bug 190058 icon for aggregation type data items.
For aggregation type data items in cross tabs, we should show the icon instead of the sigma symbol. I am attaching the icon to replace it
xtab/org.eclipse.birt.report.item.crosstab.ui/src/org/eclipse/birt/report/item/crosstab/internal/ui/editors/editparts/MeasureAggregationEditPart.java
if (!hasBindingFunction( ))
		{
			return super.getText( );
		}
		String retValue =  getMeasureName( );
		if (retValue == null)
		{
			return super.getText( );
		}
		return PREFIX+ "[" + retValue + "]"; 
	}
	
	private String getMeasureName()
	{
		try
		{
			DataItemHandle handle = (DataItemHandle) getModel( );
			
			ComputedColumnHandle bindingColumn = DEUtil.getInputBinding( handle, handle.getResultSetColumn( ) );
			
			DataRequestSession session = DataRequestSession.newSession( new DataSessionContext(DataSessionContext.MODE_DIRECT_PRESENTATION) );
			return session.getCubeQueryUtil( ).getReferencedMeasureName( bindingColumn.getExpression( ) );
		}
		catch ( BirtException e )
		{
			return null;
		}
	}
}