We copy the same feature from alt styles, now that the UI is shared via
support form helpers! Easy peasy!
This adds a "Then: Go to unlabeled appearance" checkbox next to the
submit button on the pet appearance edit form. If checked, it takes you
to the first unlabeled appearance in the database, and keeps the box
checked for next time. Slam through 'em!
Oh right, yeah, we like to do things gracefully around here when
there's no corresponding color/species record yet!
Paying more attention to this, I'm thinking like… it could be a cool
idea to, in modeling, *create* the new color/species record, and just
not have all the attributes filled in yet? Especially now that we're
less dependent on attributes like `standard` to be set for correct
functioning.
But for now, we follow the same strategy we do elsewhere in the app: a
pet type can have `color_id` and `species_id` that don't correspond to
a real record, and we cover over that smoothly.
