Also remove unused empty jsinput_css.css.

I missed these files the first time around.

TNL-5893

Add /me endpoint for retrieving own username when logged in.

Update translations (autogenerated message)

Use the system version of Firefox

Merge pull request #14271 from edx/release-candidate

Discussion hide Add a Response button response count if zero other responses in an answered question

Move Sequence coffee files to JS

Merge Release candidate into release

Use the system version of firefox for running test.

It's always bugged me that the help strings were nonsensical

fix auto enroll var mistake

Remove Sailthru enrollment related signal handlers 

Error while exporting course with too long filename

While here, the one-line docstring also bothered me.

Remove Sailthru enrollment related signal handlers because they are being invoked from the ECOM service already.
ECOM-6581

update_course_in_cache error handling cleanup.

Merge pull request #14256 from edx/cale/release-candidate-for-merging

DOC-3526 Clarify roles for cert activation

Improve error handling for Video Uploads

Remove Datadog instrumentation around model saves

Cale/release candidate for merging

We added this a long time ago as part of the shift to opaque-keys, but
left it on because it's occasionally useful for spotting unusual levels
of activity for certain models. That being said, because we have so
many models now, we're generating too many differently named metrics,
which might get expensive.

This is doing the simplest thing and just removing datadog reporting
of model updates altogether.

Tnl-4777

update edx-ui-toolkit version

Test for missing submission score