Added completion mode to discussion XBlock

EDUCATOR 2283 - Removes the new course outline waffle flag.

Update and refactor random password generator

We want to unblock this PR from merging.
Created EDUCATOR-2728 to track

Remove CourseStructure usage in CourseGraph

TE-2515 Fix occasional help link test failures

Reject acct creation when using a retired username.

Change from specifying a retired username/email format to specifying
  a retired username prefix and a retired email prefix/domain,
  preventing possible config errors due to unexpected/bad formats.

This basically commits the transpiled CoffeeScript JS (with minor
cleanup) and removes coffee build support.

A tiny amount of support for xblocks exists, because external users
may have xblocks with coffee. But no coffee in our tree anyway.

This moves the original files into their JS locations so that when
the next commit modifies them, we dont lose history.

Update the list of supported browsers in the example about page
template.

Remove merge conflict cruft from github.txt

PLAT-2060 Use pip-tools to manage requirements files (take 2)

Remove use of the deprecated course_structures module.

This reverts commit a7fa0c21.

bump ora2 release to 2.1.15 to fix EDUCATOR-2634

mark support (re)issued entitlements as unrefundable

LEARNER-4882: Create new auth endpoint for checking user password.

Add alignment options to the TinyMCE platform plugin

LEARNER-4578: Adds in JQuery password validation on Studio

[ENT-924] Replace sensitive SSO usernames with generic Enterprise displayname

Merge pull request #17939 from edx/testeng/bokchoy_auto_cache_update_41cf5bc005c4a258207e87677b0f85c1b47008b5

Bokchoy db cache update

Fix 500 error on new contact us form.

Iahmad/migrate transcripts s3