Fix JS tests that broke due to a conflict between merges

Correct logistration GET parameter preservation test case

Enforce MAX_COMMENT_DEPTH in discussion_api

Upgrade rednose to latest to fix bad output.

Reverification iOS support and refactor

Updates the XBlock utils requirement to the latest

Fixed two paly_video events emitted on video replay.

* Delete reverification templates
* Delete photocapture.js
* Delete unused "name change" end-points
* Rebuild the reverification views using Backbone sub-views
* Stop passing template names to the JavaScript code
* Avoid hard-coding the parent view ID in the webcam view (for getting the capture click sound URL)

Fix flaky test. SOL-975

This integrates the fixes from https://github.com/edx/xblock-utils/pull/20 and https://github.com/edx/xblock-utils/pull/21 - cf the PRs for the code review & +1s.

CC @smarnach @sarina

TNL-2166

Credit eligibility requirements display on student progress page

Merge pull request #7898 from edx/ahsan/AC-99-learner-profile-location-language-fields-accessibility

Learner profile Location and Language fields Accessibility issues

ECOM-1523

Following are done in this PR
1-The controls to edit the form fields were hyperlinks, added button and required css to
  make it look like hyperlink.
2-label added when swap to combobox
3-Non breaking spaces added with dashes.

ECOM-1772 Due date issue test case fixed.

Remove flaky flag, improve linting.

Adding call stack manager Version-I

Updated Payment Buttons

Make course tab refreshing safer.

Re-nest for the signal-sending, then un-nest.

fix price per seat

The payment buttons now match the style of the verified upgrade buttons.

XCOM-422

Handle whitespace-only content in discussion API

Add editable_fields to discussion API responses

Add more extensive testing

Fix discussion_api to handle old threads

This will allow clients to determine what actions (e.g. following,
endorsing, and editing content) a user can take on a piece of content.

The comments service rejects whitespace-only content for certain
strings, so the discussion API should also reject such content.

MA-844 Video Upload: remove dependency on AssetMetaDataStore.

Update translations (autogenerated message)