Allow setting mailrule order from frontend

src/paperless_mail/views.py

@@ -27,7 +27,7 @@ class MailAccountViewSet(ModelViewSet):
 class MailRuleViewSet(ModelViewSet):
     model = MailRule
 
-    queryset = MailRule.objects.all().order_by("pk")
+    queryset = MailRule.objects.all().order_by("order")
     serializer_class = MailRuleSerializer
     pagination_class = StandardPagination
     permission_classes = (IsAuthenticated,)