Add filtering by group for Role list page in admin.

 - Legacy-Id: 4068

Author: levkowetz

ietf/group/admin.py

@@ -114,7 +114,7 @@ class RoleAdmin(admin.ModelAdmin):
     list_display = ["name", "person", "email", "group"]
     list_display_links = ["name"]
     search_fields = ["name__name", "person__name", "email__address"]
-    list_filter = ["name"]
+    list_filter = ["name", "group"]
     ordering = ["id"]
     raw_id_fields = ["email", "person", "group"]
 admin.site.register(Role, RoleAdmin)