cubicweb #5481617 KeyError in editcontroller [validation pending]

if you get a form which doesn't cary information about some mandatory relation (maybe because this relation is set by a hook), you ends up with a KeyError when the form is posted.

prioritynormal
typebug
done in3.20.8
load0.500
load left0.000
closed by#cb3a48780615 fix EditController._ordered_formparams method in case some mandatory relation isn't specified