Support keys option for select fieldtype

[I-Valchev]

No description provided.

[bobdenotter]

Let's not. This caused much headaches in the v3 days. It should only be ids, and we'll provide a snippet in docs how people can fetch the records, without having to change the "keys"

(keeping open, until docs are updated)

[I-Valchev]

👍 I'll update the docs.

[bobdenotter]

I think it's sufficiently documented here, now: https://github.com/bolt/docs/blob/4.0/docs/fields/select.md#outputting-selected-options

[I-Valchev]

Yes, lets close this :-)