TNL-6381 added an upgrade upsell to course info. In PR #15265, this was
partially removed/moved, but some clean-up work remained.

LEARNER-2026

Only show course sock to English readers.

LEARNER-39

LEARNER-39

TNL-6381

TNL-4651

Fix syntax error in selectors

.attr() now returns a string (though it can still be passed an integer)

Fixes checkbox test failures

Remove remaining references to jquery.min (in wrong folder)

$.ajax now returns 422 if type is json and body is not JSON, e.g. ''

Substitute prop for attr

Remove references to jquery.min, add jquery.migrate (again)

"Fix" jquery karma config

This wasn't suppoed to survive the merge

This throws an error when called with an 'undefined' error

Fix Karma warning about [re|un]loading the window

Fix path for jquery in cms-squire tests

Move jasmine.clock.uninstall() to afterEach so it runs even on failure

Fix test failing due to timezone issues

Do the timeout before the window scrolling (so handler will not be _.throttled)

Fix an alert() triggered by window.onBeforeUnload while testing in Chrome

Events are added for accessing the courseware, entering the verified
upgrade flow, and toggling a course update.

ECOM-2983

ECOM-2809