Before this commit if `display_name` was in the view, the breadcrumb when creating a new record, the breadcrumb would display either `Unnamed`, either the last value of `_title` in `action_mixin`. The default value when creating a record should be `New`, but the return was ignored because `display_name` was found in the view closes odoo/odoo#36565 Signed-off-by: Yannick Tivisse (yti) <yti@odoo.com>