Co-authored-by: Viggodevries <viggo@highbiza.nl>

* Implemented predefined product options

* css

* added missing migration in the test app

* Added tests

* added test

* added test

* Added more testz

* Added validation

* Renamed add_optional_choice to add_empty_choice

* added release notes

* Added help_text help text.

yup

* Use a JSONField for the option value

* removed pylint

* fix display of multi and checkbox in basket and order (#13)

* fix display of multi and checkbox in basket and order

Co-authored-by: willeke huizing <38961397+willekeh@users.noreply.github.com>

The attribute wasn’t persisted to database because the save() method was
not called. This was inconsistent with other fields.

Fixes #3767.

- Remove deprecated features and update deprecation notices for next
release.
- Update release notes.
- Bump version

- allow creation of offers of all types
- allow creation of vouchers with multiple offers
- allow creation of voucher sets of all usages, and with multiple offers

Where an initial value is required, this should be set on the form field
itself.

Fixes #3590.

Co-authored-by: Basil Dubyk <samitnuk.work@gmail.com>
Co-authored-by: Alexander Gaevsky <sasha@sasha0.ru>
Co-authored-by: Joseph Wayodi <jwayodi@gmail.com>

Fixes #3258.

Non-exclusive offers that only allow combination with specific other offers

These release notes were created in 6a03a0bc1f and 05b14af8af, but
somehow didn't make it into the master branch.

This is why http://docs.oscarcommerce.com/en/latest/releases/index.html
currently doesn't mention these releases.

Currently, if a valid basket line is marked for deletion, any other
invalid basket lines on the formset prevent it from being deleted.

Regression introduced in cca43aa4d1