[dev] horde_form / read-only fields

[Marko Djukic]

if a field is marked as required, but then during some logic is switched over to
'read-only' when being set up (ie. same form code being used in a few
situations)... it remains required, will generate unseen "is required" messages
and fail to submit.

should a read-only, required field be passed along as hidden, or in should this
be handled behind the sense, or something completely different?

marko