[uicfg] give a set_fields_order method to the primary view display control
Hence it is nicely symmetrical with the fields kwargs.
Closes #2741963.
# -*- coding: utf-8 -*-
# copyright %(year)s %(author)s, all rights reserved.
# contact %(author-web-site)s -- mailto:%(author-email)s
#
%(long-license)s
"""%(distname)s schema"""