Remove the field "slug" (identifiant textuel) and replace it with an auto-generated one
Currently, a "slug" identifies the field in the cfData field on the entity. The slug must, currently, be defined by the user.
It is not evident for the user to fill this field. It might become completely inconsistent if the question label is changed (the slug remains the same, but without matching the question).
I suggest to auto-generated it and to replace it by an UUID.
I was thinking about replacing it with the id, but this might break backward compatibility.