New Notification

* adds new notification setting to user settings form
* adds translations
* adds initial creating of ENUM on setup command

user/forms.py

@@ -7,7 +7,7 @@ Created on: 08.07.21
 """
 from dal import autocomplete
 from django import forms
-from django.db import IntegrityError, transaction
+from django.db import transaction
 from django.urls import reverse, reverse_lazy
 from django.utils.translation import gettext_lazy as _