[views] Fix overriding with cw3.25

overriden function now returns a generator, we've to turn it to a list.

cubicweb_seda/views/simplified.py

@@ -55,7 +55,7 @@ class StartDateAutomaticEntityForm(autoform.AutomaticEntityForm):
 
     def editable_attributes(self, strict=False):
         """return a list of (relation schema, role) to edit for the entity"""
-        attributes = super(StartDateAutomaticEntityForm, self).editable_attributes(strict)
+        attributes = list(super(StartDateAutomaticEntityForm, self).editable_attributes(strict))
         if self.linked_to.get(('seda_start_date', 'subject')):
             eid = self.linked_to[('seda_start_date', 'subject')][0]
             start_date_of = self._cw.entity_from_eid(eid).cw_etype