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
* @param key
	 * @return DE defined property key
	 */
	public static String getGUIPropertyKey( String key )
	{
		if ( key != null )
		{
			return (String) propertiesMap.get( key );
		}
		return null;
	}
	/**
	 * Transform other units to pixel.
	 * 
	 * @param handle
	 *            DimensionHandle of model to keep the measure and units.
	 * @return The pixel value.
	 */
	public static double convertoToPixel( Object handle )
	{
		return convertToPixel( handle, 0 );
	}
	/**
	 * Transform other units to pixel.
	 * 
	 * @param object
	 *            model to keep the measure and units.
	 * @param fontSize
	 *            the parent font size.
	 * @return The pixel value.