Before this commit, updating a boolean field through a server action was
possible but unintuitive: if you wanted to set the field to `False`, you
had to leave the value empty - worse, writing down `False` would be
considered truth-y since it was evaluated as a string!
This commit introduces a simpler UX for these cases, where the user can
select Yes/No in a selection field if the field they're trying to update
is a boolean field.
Task-3450200
Part-of: odoo/odoo#138804
Damien Bouvy
05e5b48971