Bug
===
Since cc67988241 a new option is available
for the reference widget.
When the new option "model_field" is used on a reference field in a list
view, after saving and then editing, we need to change the model to be
able to select the records
Links
=====
Task-2127615
See odoo/odoo/pull/46304
See odoo/enterprise/pull/7701
See odoo/upgrade/pull/848
closes odoo/odoo#46304
Related: odoo/upgrade#848
Related: odoo/enterprise#7701
Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>