fix label in generated form for relations
the label for object relations was incorrect, because the '_object' mangling is
done on the wrong component of field.label.
fix ticket 472831
Latest changes --------------* table of `all latest changes`_Links below is providing useful RQL query example..._all latest changes: view?rql=Any+M%2CX+WHERE+X+modification_date+M+ORDERBY+M+DESC+LIMIT+30