Resolve "Filter selects on week overview and register absence"

Closes #79 (closed)

aleksis/apps/alsijil/model_extensions.py

@@ -100,6 +100,10 @@ Group.add_permission(
     "view_week_class_register_group",
     _("Can view week overview of group class register"),
 )
+Group.add_permission(
+    "view_lesson_class_register_group",
+    _("Can view lesson overview of group class register"),
+)
 Group.add_permission(
     "view_personalnote_group", _("Can view all personal notes of a group")
 )