notifications: add new_notifications to context variables (#17111)

combo/apps/notifications/models.py

@@ -123,6 +123,7 @@ class NotificationsCell(CellBase):
         if user and user.is_authenticated():
             extra_context['notifications'] = Notification.objects.filter(user=user,
                     start_timestamp__lte=now(), end_timestamp__gt=now()).order_by('-start_timestamp')
+            extra_context['new_notifications'] = extra_context['notifications'].filter(acked=False)
         return extra_context
 
     def get_badge(self, context):