Fixed close button click issue

TNL-4444 correcting fullscreen transcript skip links

Mocking some modules that were missing during platform API doc builds.

[PERF-303] Integer XBlocks/XModules into the static asset pipeline.

This PR, based on hackathon work from Christina/Andy, implements a way to discover all installed XBlocks and XModules and to enumerate their public assets, then pulling them in during the collectstatic phase and hashing them.  In turn, the methods for generating URLs to resources will then returned the hashed name for assets, allowing them to be served from nginx/CDNs, and cached heavily.

ECOM-3968 updated program card link alt text

TNL-4366 Hide Timed Exams

TNL-4396 Apply same fix to edx dashboard

When using RequireJS load spec files one by one.

Replace backbone-min.js to backbone.js

Jasmine has a global stack for creating a tree of specs. We need to load
spec files one by one, otherwise some end up getting nested under others.

Switch to using the standard edxapp-migrate-(lms|cms) tools

TNL-4427: Add additional JavaScript context tags

TNL-4317: Add helper for checking git commit is safe

This was fixed on the openedx dashboard, but missed on the edx.org theme
for the dashboard.

TNL-4366
Changes in studio to allow the hide_after_due setting to be utilized.

Includes:
    -python changes to contentstore, where the data is stored.
    -refactoring of timed-examination-preference-editor.underscore, to add this
        setting and make the editor more accessible.
    -javascript changes to link the new setting to the correct data model.
    -sass updates to fix a11y issues on the editor modal.
    -addition of post-due visibility information to course outline in studio.
    -new tests: python, js, acceptance, and a11y

Contains latest release, changes for TNL-4366

Update translations (autogenerated message)

Create a 4th shard for lms unit tests

Renamed 'programId' to use 'id'

edxapp-migrate-lms figures out at system build time what databases
it needs to migrate (just default, or default + student_module_history).
This avoids paver needing to be clever about figuring out if a user has
enabled the split CSMHE databases flag and permits this to merge early
and safely.

We can turn the CSMHE flag on from configuration at the same time we
enable all of the database config and ensure that the new database is
created.  Until a devstack is provisioned using that version of
configuration, it'll continue to have 1 DB and migrate 1 DB.  This
allows us to better control deployment.

Come up to a newer New Relic version.

More accurately, this creates a 4th shard because the
last shard is always the default.

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

TNL-4326: Add Python linting

Removing the focus outline for the main container in LMS

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