Refactor choosing VO on_demand in feature specs
Refactor choosing VO on_demand in feature specs

We are still using the Rails view I18n scope for :use_producer_settings.
Angular requires this replacement of the default blank option, which we
use for nil on_demand, to be in the template itself.

If we eventually move this template to a JS template, we can move it to
the same I18n scope as the :yes and :no options.

Matt-Yorkley/openfoodnetwork,mkllnk/openfoodnetwork,lin-d-hop/openfoodnetwork,mkllnk/openfoodnetwork,Matt-Yorkley/openfoodnetwork,lin-d-hop/openfoodnetwork,mkllnk/openfoodnetwork,Matt-Yorkley/openfoodnetwork,openfoodfoundation/openfoodnetwork,openfoodfoundation/openfoodnetwork,lin-d-hop/openfoodnetwork,openfoodfoundation/openfoodnetwork,lin-d-hop/openfoodnetwork,mkllnk/openfoodnetwork,Matt-Yorkley/openfoodnetwork,openfoodfoundation/openfoodnetwork