Use timetable overview rule as parent menu point permission

aleksis/apps/chronos/frontend/index.js

@@ -7,7 +7,7 @@ export default {
     titleKey: "chronos.menu_title",
     icon: "mdi-school-outline",
     iconActive: "mdi-school",
-    validators: [hasPersonValidator],
+    permission: "chronos.view_menu_rule",
   },
   children: [
     {

aleksis/apps/chronos/rules.py

@@ -62,3 +62,7 @@ add_perm("chronos.delete_supervision_substitution_rule", delete_supervision_subs
 # View room (timetable)
 view_room_predicate = has_person & has_room_timetable_perm
 add_perm("chronos.view_room_rule", view_room_predicate)
+
+# View parent menu entry
+view_menu_predicate = has_person & (view_timetable_overview_predicate)
+add_perm("chronos.view_menu_rule", view_menu_predicate)