* Stripe SCA
- Upgrade to latest Stripe API
- Deprecate Stripe Checkout for CC
- Migrate CC payments to Payment Intents
* Move SCA to its own view
* Handle CardErrors for PaymentIntents
* Abilty to handle charge webhooks with PaymentIntents
* Better handling of Stripe References
* Fix Stripe Tests
* Move SCA page into orderlayout; perform iFrame SCA
* Handle disputes and pi-webhooks better, fill more into ReferencedStripeObject
* Optionally pass prefetched PaymentIntent to handle-func
* Fix style
* Send message to window.parent not window.top (widget compatibility)
* More accurate loading message
* Show a cog on sca_return.html. On a good internet connection, you barely see it, but on a bad one…
* Robust error handling
* If it's a method and used like a method, let's actually call it like a method!
* Remove logging statement
* Fix JavaScript interference with other frame events
* Use 4:3 aspect ratio, but at least 600px
* Adjust to django_scopes
* .
* Add a position detail page to the frontend
* Mail templates
* Send mails
* Send reminder email
* Add position support to sendmail plugin
* Add and fix some tests
* Fix failing test on real databases
* Upgrade django and stuff
* Update to Django 2.2 and recent versions of similar packages
* Provide explicit orderings to all models used in paginated queries
* Resolve naive datetime warnings in test suite
* Deal with deprecation warnings
* Fix sqlparse version
- [x] Provide data model and configuration toggle
- [x] Allow to delete individual test orders
- [x] Add tests
- [x] Add a prominent warning message to the backend if test mode orders exist (even though test mode is off), as this leads to wrong statistics
- [x] Decide if and how to generate invoices for test orders as invoice numbers cannot be repeated or should not have gaps.
- [x] Decide if and how we expose test orders through the API, since our difference pull mechanism relies on the fact that orders cannot be deleted.
- [x] Decide if and how we want to couple test modes of payment providers?
- [ ] pretix.eu: Ignore test orders for billing
- [ ] Adjust payment providers: Mollie, bitpay, cash, fakepayment, sepadebit
