Bug 136074 Filter editor needs to support column binding
In the Fitler tab of property editor for table/chart, Expression only shows dataset column, rather than column binding. Since column binding is supported for filter of table/chart, this is supposed to show the column binding.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/views/attributes/providers/FilterModelProvider.java
}
		if ( key.equals( FilterCondition.OPERATOR_MEMBER ) )
		{
			IChoice choice = choiceSet.findChoice( value );
			if ( choice != null )
			{
				return choice.getDisplayName( );
			}
		}
		else
		{
			return value;
		}
		return "";
	}
	/**
	 * Saves new property value to filter
	 * 
	 * @param element
	 *            Filter object
	 * @param key
	 *            Property key
	 * @param newValue
	 *            new value
	 * @return The value according the key
	 */
	public boolean setStringValue( Object item, Object element, String key,
			String newValue ) throws NameException, SemanticException
	{
		if ( !key.equals( FilterCondition.OPERATOR_MEMBER ) )