View is combined with user SSO views.

Includes a new version of the view that takes explicit "username" or "email".

OC-4285

Note: this version update is backward incompatible.

ARCH-255

relied on the old configuration values and old way of validating
passwords. Also improved registration page by always showing error
messages rather than hiding them on leaving the field.

From edx-drf-extensions:
1. EnsureJWTAuthSettingsMiddleware: Ensures proper JWT auth settings
   for endpoints.
2. JwtAuthCookieMiddleware: Combines the JWT auth cookie parts into a
   JWT auth cookie.

ARCH-233

Use LOGIN_REDIRECT_WHITELIST to provide a whitelist of
additional domains to which login will now redirect.

ARCH-238

These views and tools don't seem to be enabled and I think it's safe to
say that we have migrated to LMS+CMS.

This upgrades DOT by reverting the revert.

This reverts commit 4d8b9c36

ARCH-180

Add more parameters to COURSE_ENROLLMENT_MODES to allow to display friendly mode name and more options

Fix python tests of PR #18557

PR #18557: Fix Diff Quality test line too long

PR #18557: Fix Diff Quality test unused-variable

Use six.iteritems() in COURSE_MODE_SLUG_CHOICES for future Python 3 compatibility

ARCH-223

ARCH-223

ARCH-220

ARCH-193

This reverts commit 370501d1.

These are old feature flags that are no longer used:

ENABLE_MANUAL_GIT_RELOAD was to allow instructors to reload an XML
Modulestore course directly from a git checkout. That Modulestore
backend hasn't existed for a while.

DEBUG_LEVEL was an early flag for how debug log verbosity.

USE_YOUTUBE_OBJECT_API was created in reaction to YouTube breaking
their iframe API. They have long since addressed those issues.

Enable the journal app in LMS. Add support to display Journals on index
and courseware pages and dashboard.

LEARNER-5620

There are other annotations features still in the platform but this one
is the one that works with an annotations server that was specialized
and not generally used by most instances of the platform.

The initial PR to remove this was made by 'lduarte1991' and can be found
here: https://github.com/edx/edx-platform/pull/17299

The work done based on the squashed commits:
removed advanced modules config for annotations
remove module files and config for annotations
remove js and css files related to annotations, under ova folders
removed js and css annotator file configs for cms and lms
remove template html files for annotations
removed annotations options from static html book
Added back some files that were originally marked "for OVA" but others used as per acceptance tests
Added back css file configs incorrectly marked as ova
Remove annotation related advanced settings from test.
Correct hls require.js pathing.

There was an issue with migrations on sandboxes.

This reverts commit 58f6e925

 - ENT-1070

This will retire a refresh token and access token pair in the DOT tables
if the access token is 6 months expired (prior to that, the refresh
token still works).