Revert "Upgrade DOT to 1.1.2." - Take 1

Import factories/base.js when using webpack to fix nav

Configure MathJax when it's loaded by XBlocks in studio

Run `make upgrade`.

There was an issue with migrations on sandboxes.

This reverts commit 58f6e925

Remove flaky test_edit_raw_html.

Tornado Changelog: http://www.tornadoweb.org/en/stable/releases/v5.1.0.html

EDUCATOR-3186

update studio-frontend package to 1.13.0

Remove flaky studio unit test.

Remove flaky test_library_content_side_bar_help.

Upgrade DOT to 1.1.2 and add paver warning.

When using RequireJS, MathJax was configured in an `init` function
in the RequireJS config. With the switch to Webpack and $script,
that configuration needed to be moved to the dynamic loading done by
$script.

[EDUCATOR-3160]

mroytman/educator 3026 add links to course checklist

change course_validation endpoint to support option to get data for only graded assignments and add ability to scroll to elements on the course outline page

EDUCATOR-3183

factories/base.js is the library responsible for enabling the Studio nav
menu. When using webpack, we need to be sure to import it specifically,
because the webpack imports override the React code that pulls it in
on most pages.

[EDUCATOR-3150]

Change default content filter to include only courses

 - ENT-1070

Fixed make extract_translations

Remove i18n-tools strict generate to fix jenkins

job to work even if some resource is not available.

PLAT-2217 - fix partner reporting queue 500 errors, reduce log spam

Starter code to enable pytest-xdist with remote ECS containers

updated vertical alignment for learner profile menu

Authn: remove unneeded oauth_dispatch views

Video player seek issue

Fix display of all words in word clouds.

Update sailthru audit purchase calls

 The embedded video player does not allow the screen reader user to seek forwards / backwards within the time with the keyboard as you could in the past. If you tab to play a video and press spacebar or enter, you formerly would be able to press left / right arrow to move slightly forward or backward in time, but this no longer works correctly; it will move 1 second back / forward, then you need to press tab again to refocus and move another 1 second. Other keyboard access seems to be equivalent and we suspect a slight error in the Javascript is causing this and needs to be fixed.

EDUCATOR-3034