json: export display id

extra/modules/myspace.ptl

@@ -393,7 +393,7 @@ class JsonDirectory(Directory):
 
         return json.dumps([{'title': _('%(name)s #%(id)s (%(status)s)') % {
                                      'name': x.formdef.name,
-                                     'id': x.id,
+                                     'id': x.get_display_id(),
                                      'status': x.get_visible_status(user=self.user).name},
                             'url': x.get_url()} for x in user_forms])