MA-1182 - added test for not enrolled in course, removed commented out nose test code, formatted import statements according to edx standards

remove "defensive code" until we can figure out how to actually
catch the errors,

TNL-3202

TNL-3249

TNL-3248

Now emitting `edx.team.deleted` event where relevant. Includes tests.
Also includes tests to cover learner_removed events that are fired
as part of the deletion process, as well as learner_removed events
fired from the edit membership view.

Adding these deleted events has brought about a change in the teams
API - the DELETE membership endpoint now takes an optional `admin`
query parameter to differentiate between admin removal and self
removal for analytics purposes.

Also includes some changes needed to get page viewed events working
with admin tools changes made in this PR.

Adding my humble attempts at making the tools match the wireframes
given in invision. Only done via changes in _developer.scss, the
real rules will be made by UX team elsewhere.

Includes preliminary accessibility feedback, and basic RTL.

TNL-1913

TNL-3164 TNL-3163

All the non-CSS changes to get instructor toolbar working as in
wireframes, with non of the functionality or style.

TNL-3232

TNL-3188

TNL-3042

TNL-3228

TNL-3239

You can still edit this to meet your needs, but you won't need to
manually generate one.

ECOM-2044

Hide shopping cart menu only if request is coming from a micro site and
requested page is from courseware.

TNL-3190

TNL-3196

TNL-3187

PR #8930

This mimics the data displayed in our oauth2 client listing and allows
you to search on identifying fields.