Allow keyword action for any model

It is possible to make generic action thanks to the active_model context. So we should allow to define them on any model.

assigned to @ced

added trytond type::feature + 1 deleted label

New review325681002 at https://codereview.tryton.org/325681002/#ps309961002

New changeset 37201325d6a4 by Cédric Krier in branch 'default':
Allow keyword action for all models
https://hg.tryton.org/trytond/rev/37201325d6a4

added 1 deleted label and removed 1 deleted label

closed

New changeset 7a7298825c38 by Cédric Krier in branch 'default':
Allow keyword action for all models
https://hg.tryton.org/tryton-env/rev/7a7298825c38

mentioned in issue #9457 (closed)