generic_m2o: Support tree view
Add support for tree view.
Odoo does not allow to add non-standard attributes to fields in tree views. So use options
attribute to specify options for generic_m2o
widget
Also, check support for 11.0, 12.0, 13.0
Add support for tree view.
Odoo does not allow to add non-standard attributes to fields in tree views. So use options
attribute to specify options for generic_m2o
widget
Also, check support for 11.0, 12.0, 13.0