Update django-oauth-toolkit requirement from ==2.3.* to ==3.1.*

Updates the requirements on [django-oauth-toolkit](https://github.com/django-oauth/django-oauth-toolkit) to permit the latest version.
- [Release notes](https://github.com/django-oauth/django-oauth-toolkit/releases)
- [Changelog](https://github.com/django-oauth/django-oauth-toolkit/blob/master/CHANGELOG.md)
- [Commits](https://github.com/django-oauth/django-oauth-toolkit/compare/2.3.0...3.1.0)

---
updated-dependencies:
- dependency-name: django-oauth-toolkit
  dependency-version: 3.1.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

pyproject.toml

@@ -48,7 +48,7 @@ dependencies = [
   "django-libsass==0.9",
   "django-localflavor==5.0",
   "django-markup",
-  "django-oauth-toolkit==2.3.*",
+  "django-oauth-toolkit==3.1.*",
   "django-otp==1.6.*",
   "django-phonenumber-field==7.3.*",
   "django-redis==6.0.*",

src/pretix/base/services/orders.py

@@ -2825,7 +2825,7 @@ class OrderChangeManager:
     def _check_complete_cancel(self):
         current = self.order.positions.count()
         cancels = sum([
-            1 + o.position.addons.count() for o in self._operations if isinstance(o, self.CancelOperation)
+            1 + o.position.addons.filter(canceled=False).count() for o in self._operations if isinstance(o, self.CancelOperation)
         ]) + len([
             o for o in self._operations if isinstance(o, self.SplitOperation)
         ])

src/pretix/control/forms/modelimport.py

@@ -21,6 +21,8 @@
 #
 from django import forms
 from django.core.exceptions import ValidationError
+from django.utils.functional import lazy
+from django.utils.html import format_html
 from django.utils.translation import gettext_lazy as _
 
 from pretix.base.modelimport_orders import get_order_import_columns
@@ -71,6 +73,9 @@ class ProcessForm(forms.Form):
         raise NotImplementedError()  # noqa
 
 
+format_html_lazy = lazy(format_html, str)
+
+
 class OrdersProcessForm(ProcessForm):
     orders = forms.ChoiceField(
         label=_('Import mode'),
@@ -91,7 +96,11 @@ class OrdersProcessForm(ProcessForm):
     )
     testmode = forms.BooleanField(
         label=_('Create orders as test mode orders'),
-        required=False
+        required=False,
+        help_text=format_html_lazy(
+            '<div class="alert alert-warning" data-display-dependency="#id_testmode" data-inverse>{}</div>',
+            _('Orders not created in test mode cannot be deleted again after import.')
+        )
     )
 
     def __init__(self, *args, **kwargs):
@@ -100,6 +109,8 @@ class OrdersProcessForm(ProcessForm):
         initital['testmode'] = self.event.testmode
         kwargs['initial'] = initital
         super().__init__(*args, **kwargs)
+        if not self.event.testmode:
+            self.fields["testmode"].help_text = ""
 
     def get_columns(self):
         return get_order_import_columns(self.event)