Add removed import

Author: Maffooch

dojo/utils.py

@@ -28,6 +28,7 @@
 from django.conf import settings
 from django.contrib import messages
 from django.contrib.auth.signals import user_logged_in, user_logged_out, user_login_failed
+from django.contrib.contenttypes.models import ContentType
 from django.core.paginator import Paginator
 from django.db.models import Case, Count, IntegerField, Q, Sum, Value, When
 from django.db.models.query import QuerySet