Retrofit programs data mixin with factories

This should make it easier to test programs-related features. Preface to ECOM-3200.

Merge pull request #12217 from edx/revert-12074-derf/clear_existing_assets_before_copying_new_assets

Revert "clear existing assets before copying new assets"

JWT authentication updates

Make it impossible to click "final check" without selecting a choice

Safe Templates

TNL-4325: Linter Enhancements for JavaScript files

Update translations (autogenerated message)

ORA2 Version 1.1.4 Release

Revert "Revert "Adding background image for xseries certificates on dashboard side bar panel""

- Lint JavaScript context for JavaScript violations
- Lint for Mako specific JavaScript rules
- Skip commented lines
- Change unicode to decode.utf8
- Count lint violations

- check proper use of JQuery functions
- check for concatenation with HTML strings
- add sort for output
- lint CoffeeScript

- Using jwt_decode_handler from edx-drf-extensions
- Updated djangorestframework-jwt
- Removed feature flag around JWT auth

ECOM-4221

clear existing assets before copying new assets

Fix django-oauth-toolkit email and inactive user issues

Merge pull request #12146 from edx/muddasser/updated_ff/sel_253/test_youtube_id_w_different_local_server_sub

fixed button click issue while repacing subtitles.

fix issue with pre-1900 course setting dates (TNL-4397)

Dynamic values for the selectboxes with tags (tags are stored in the database tables)

Fix certificate query

remove CertificateStatuses.regenerating

* truncate email from addresses if >320 chars when encoded (TNL-4264)

* use exact lengths

fix flaky condition in education dropdown.

EdX problem grade report doesn't order problems as shown in course

Revert "Adding background image for xseries certificates on dashboard side bar panel"

Displaying title of item in course sequence tooltip instead of list of item's children

Adaptation asides to be exported to the XML

Upgrade edx-management-commands to 0.1.1

SUST-35 Implementation of course_key_from_string_or_404 to return course_key or raise a 404