Convert country to unicode before sending to segment

Date summary blocks.

Fix bugs in course unenroll popup

Having the messeges embedded into onclick attributes was fragile because
it could break if the translated string contained special characters
such as single quotes.

Rather than trying to escape the special characters inside the onclick handler,
move the translatable strings into separate h-escaped data attributes and interpolate
the values in the (already existing) jQuery click handler rather than in the
inline onclick handler.

This makes the javascript code more consistent as well as fixes the problem
where the popup would break if translation included single quotes.

The string is passed through the JS 'interpolate' function,
which expects %()s style placeholders.

Hide Xblock due dates in studio for self-paced courses.

Enabled behind the
`SelfPacedConfiguration.enable_course_home_improvements` flag.

ECOM-2604

Removed read-only fields from enrollment admin

asadiqbal08/SOL-1292 Entrance Exam is not imported with an imported course

Remove flaky flag from profile bok choy test

Add a class to the course number in the page header to facilitate hiding it in a theme.

set max width for nav-account-user for long characters

The read-only protection is more hassle than it's worth when testing locally and on stage. It's a solution to a problem we don't actually have, so I have reverted the changes.

Updating edx-platform for XBlock#323

Merge pull request #10277 from edx/ahsan/ECOM-2338-adding-Messaging-and-text-improvements-unaffected-changes

Reimplemented text changes for dashboard

Egg name needs to match setup(name=..) to get installed properly

Block Cache framework (MA-1551)

TNL-3679

Upgrade segment.io and possibly improve its performance

PR for discussing the right thing to do here.

Update translations (autogenerated message)

Add SampleCourseFactory and ToyCourseFactory

TNL-3478 Cohort Membership race condition fix

Marking flaky test

Increase the test output timeout and quiet the pylint output.

Move comments within the script block.

Add the html and css changes required for XSeries

common.test.acceptance.tests.video.test_video_module.YouTubeVideoTest.test_video_component_stores_speed_correctly_for_multiple_videos
is flaky, see for details.