Since the control panel refactoring, the `context` key on a `<field>` in the
search view was ignored (like <field name='pricelist' context="{'pricelist': self}".
The previous behaviour has been reintroduced and modified a little bit.
For way too long, an ugly hack was used to get a numerical value in self. This
ugly hack was still present but wasn't working since 8.0 (at least for the
numerical value). A counter hack (see odoo/odoo@4a81e8a) was then applied to
avoid really using a `selection` widget. To get even more confused, `self` was
replaced by the *last* user-specified value.
Well, it's time to clean this mess.
Now, the `self` key is replaced by an array of user-specified values (by value,
we mean the field value i.e. the `id` for a many2one, or the `key` for a
selection field).
Task 1902826
closesodoo/odoo#30368
Martin Geubelle
212ca45660