Update add_form_query_rel_fields example to match code
Update add_form_query_rel_fields example to match code

add_form_query_rel_fields is a dict. While at it update
edit_form_query_rel_fields cut & paste errors.

dpgaspar/Flask-AppBuilder,dpgaspar/Flask-AppBuilder,dpgaspar/Flask-AppBuilder,dpgaspar/Flask-AppBuilder