PLAT-1885 Stop using deprecated BlockUsageLocator properties

OAuth: support for auto_even_if_expired REQUEST_APPROVAL_PROMPT

LMS collectstatic now runs under Django 1.11

Add babel-polyfill to fix IE11 bug

Revert "jaebradley/learner 3600 upsell modal"

* Avoid URL namespace collision for "wiki:*" by changing the
  course-specific django-wiki instance/app name to something we will
  never reverse.

* Update our custom implementation of the staticfiles app's
  CachedFilesMixin internal methods `url_converter()` and `_url()` to be
  compatible with Django 1.11.  This installs multiple shims in order to
  maintain compatibility with previous django versions.

Remove skipped testcases

ReactRenderer used Object.assign which is an ES 2015 feature that is not
supported by IE11. babel-polyfill will now polyfills that function for browsers
that do not support it before ReactRenderer tries to use it.

Improve documentation for the Open edX features

Use percentage widths to fix flex-box bug

jaebradley/learner 3600 upsell modal

ENT-678 Fix enterprise logo stretching in enterprise sidebar

Delete transcript

wip

upsell modal css

remove unnecessary newline

accidentally removed feature

update props

update modal component

update css

add additional slides

update styling

update copy

PLAT-1884 Replace deprecated xblock.fragment usage

Django App Plugins

Sort available sessions by start date.

ENT-838 Management command to change an enterprise user's username