dont show days with only deleted views

shiftregister/app/views.py

@@ -22,7 +22,7 @@ def index(request):
         del request.session["last_seen_shift"]
 
     context = {
-        "days": Shift.objects.datetimes("start_at", "day"),
+        "days": Shift.objects.filter(deleted=False).datetimes("start_at", "day"),
         "enable_asta": global_preferences["helper__enable_asta"],
     }