API; settable groups for creations of sets
By default, set are created with a link with group 1 and this value is not settable.
With this, creation success, but new set are not associated with a group because user have no right on group 1 (admin).
We need to add a way to give a group number at the creation (easy) and to allow user to get list of his groups to use it for creation (need to modify controller).
Good news, some functions already exist in web2py and probably py4web to get this values, but are not linked to a controller to expose it.