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
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/editors/schematic/editparts/DataEditPart.java
dialog.setInput( handle, DEUtil.getInputBinding( handle,
					handle.getResultSetColumn( ) ) );
		}
		else
		{
			dialog.setInput( handle );
		}