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
{
			exp += IReportElementConstants.OUTER_BINDING_COLUMN_PREFIX;
		}
		exp += "[\"" + DEUtil.escape( column.getName( ) ) + "\"]";
		return exp;
	}
	private static boolean isCrosstabElement( DesignElementHandle element )
	{
		if ( element instanceof ExtendedItemHandle
				&& ( (ExtendedItemHandle) element ).getExtensionName( )
						.equals( "Crosstab" ) )
		{
			return true;
		}
		if ( element.getContainer( ) != null )
			return isCrosstabElement( element.getContainer( ) );
		return false;
	}
	/**
	 * Returns the level between the holder and the given handle
	 * 
	 * @param holder
	 *            the handle of the holder
	 * @param baseElement
	 *            the handle of the base element
	 * 
	 * @return the level between the holder and the base element, or -1 if the
	 *         element is not a children of the holder
	 */
	public static int getBindingLevel( DesignElementHandle holder,