clean flaky test

Improve screen reader support on logistration pages

ECOM-6107

Use DRF extensions 1.2.2 to fix test suite bug

See http://nedbatchelder.com/blog/201612/finding_test_coupling.html for
the complete saga.

Checks access using the CCX course key instead of the base course key

OSPR-1527: robrap/credo hide bookmarks feature in lti mode

TNL-5770 (non-)flaky test

Adding support for UTM Tracking to apply to free purhases

TNL-6203 Fix Duplicate button in Studio if user language is changed.

Video upload restrictions

ECOM-6450

Updating commerce api endpoint to capture user UTM cookies and resend them in the server request to the ecommerce IDA.
Currently, the non-free purchases are tracked because the user makes the request directly on ecommerce and user cookie
contains UTM data, but for free purchases, the UTM cookie isn't sent in the background server request to the ecommerce
IDA.

Flaky inline discussions test marked with @flaky

instead of using the base course key (which does not contain the CCX info).
This removes the need for special checking of CCXKey/CCXLocator types, and just
treats them like normal CourseKeys.

This fix allows users with a Staff role on a CCX course to view CCX courses in Insights.

Save content library selected blocks during transform phase.

Fix quality issues

Merge Release back into master

Fix release merge conflict

transform phase

TNL-6198

change variable name

Release candidate

Revert Marketing URL changes

This reverts commit bde0f7b2, reversing
changes made to 71693c3a.

This reverts commit dec4034b, reversing
changes made to ef55cc4f.

This reverts commit f7a0c1d9, reversing
changes made to dec4034b.

Test retrieving subsection grade after losing access to block in subsection

MA-3052: avoid catalog integration for individual course when cached

context manager for course id in context

TNL-5487 – Fix InvalidKeyError on render xblock