Fixes tests, adds internationalized strings for new state tooltips, corrected tooltip javascript, etc.

Iniital refactor of capa styling for basic checkbox and multiple choice problem types, including additional comments to sass styles

This should be ported to bok-choy, but until then we should fix the flakiness in
this test. It needs to wait for the page to change after the user clicks 'reset'.

Serve branded footer JSON/HTML/CSS/JS from an API endpoint
in the branding app.  Refactor OpenEdX and EdX.org footer templates
to use the Python version of the API, ensuring that the API
values are consistent with the footer included in main.html.

Detailed changes:

* Added footer API end-point to the branding app.
* Footer API allows the language to be set with querystring parameters.
* Footer API allows showing/hiding of the OpenEdX logo using querystring parameters.
* Deprecate ENABLE_FOOTER_V3 in favor of the branding API configuration flag.
* Move no referrer script into main.html from the edx footer template.
* Rename rwd_header_footer.js to rwd_header.js
* Cache API responses.

Authors:
Awais Qureshi, Aamir Khan, Will Daly

These are already covered by bok-choy tests:
  File: test_lms.py
  Class: HighLevelTabTest

Assessment problems was having input type="button" which cause accessibility issues.
changed them to <button> and added span with class sr.

TNL-1693

This change will also move us to bok-choy instead of lettuce for
these scenarios, and re-enable them. See TE-736.

Includes some refactoring of repeated event-checking code as well.

Also cleaning up some lint.

This test consistently fails when combining
lms acceptance onto one shard. (TE-737)

Makes logistration available at /login and /register as well as /accounts/login/ and /accounts/register/. In addition:

- Adds support for redirect URLs in third party auth for combined login/registration page
- Adds support for external auth on the combined login/registration page
- Removes old login and registration acceptance tests
- Adds deprecation warnings to old login and register views
- Moves third party auth util to student_account
- Adds exception for microsites (theming)

Removes old payment and verification endpoints, views, templates, and tests, making the new split flow the default. The SEPARATE_VERIFICATION_FROM_PAYMENT feature flag is also removed.

TNL-651

Remove Jobs, News
Change "Vision" to "About"

Revert "If feature flag is enabled, replace the old login/registration pages with the new combined login/registration page."

This reverts commit f40447b3.

Conflicts:
	lms/urls.py

Revert "Add support for external auth on the combined login/registration page"

This reverts commit 98875339.

Conflicts:
	lms/templates/courseware/mktg_course_about.html
	lms/urls.py

Add support for redirect URLs in third party auth for combined login/registration page

Remove old login/registration acceptance tests

Add deprecation warnings to old login and register views

Move third party auth util to student_account

Add exception for microsites

indentation of opening bracket's line

Set marketing site logged in cookie from third party auth.

Users may want to start anew when answering a question. This commit decouples reset from randomization while still preserving backward compatibility. Users can clear their input.
Instructors can set course-wide and problem-specific settings for reset button display.

Better verification for troubleshooting LTI test failures
Dismiss any lingering alerts after lettuce scenarios