cubicweb-seda #14157254 boites intempestives [validation pending]

cf https://demo.logilab.fr/seda/sedacontent/35594

prioritynormal
typebug
done in0.4.0
load left0.000
closed by#187b2c8dd288 [ui] Don't show schema relation/entity type related to a concept scheme. Closes #14157254
patch[ui] Don't show schema relation/entity type related to a concept scheme. Closes #14157254 [applied]