cubicweb-collaboration #3592577 itree over clone_of messes up breadcrumbs [validation pending]

It does not make much sense, in my opinion, to display the original of a clone in breadcrumbs.

priorityimportant
typebug
done in0.2.0
load0.300
load left0.000
closed by#7121a6674c01 [adapters] Prevent collaborative entities from messing up breadcrumbs (closes #3592577)
patch[adapters] Prevent collaborative entities from messing up breadcrumbs (closes #3592577) [applied]