EDUCATOR-1234

for EDUCATOR-525

The verified seat upgrade deadline for self-paced course runs is now
dependent on when the learner was first able to access the content--the
latest of enrollment date and course run start date.

LEARNER-1696

This sock sits at the bottom of both the home and the course content pages. It allows the user to click a 'Learn More' button to open a panel that allows the user to navigate to the upgrade checkout page. The sock is only shown for users that have not yet upgraded in a course that has a verification upgrade date that has not yet passed. Python tests cover the various course mode and upgrade dates.

LEARNER-1366 EcommerceService should be able to provide a link to the basket page that contains multiple products

This reverts commit d59ab18b, reversing
changes made to 0ebab35e.

Converts the dates on the dashboard, sidebar navigation, and important course dates to user specified time zone.

This issue would show up when date formatting strings are translated
with Unicode characters (like when testing with fake Esperanto
translations).

ECOM-3673 Update the course end date description text to remove the reference to certificate when course enrollment is in audit mode

ECOM-3673 Update the course end date description text to remove the reference to certificate when course enrollment is in audit mode

. And change the verification link in the sidebar to redirect to new basket if the EcommerceService is enabled.

. And change the verification link in the sidebar to redirect to new basket if the EcommerceService is enabled.

ECOM-2810

Please note that this is a squshed commit and the work of:
Symbolist, macdiesel, nedbat, doctoryes, muzaffaryousaf and muhammad-ammar

Adds UTC time to the "Today's Date" block, and a fuzzy/relative
timestamp to all other displayed dates.

ECOM-2807

I also took this opportunity to do some small cleanups of the date
summary code, specifically converting some attributes to properties in
order to remove a Pylint directive disabling warnings about missing
docstrings.

Enabled behind the
`SelfPacedConfiguration.enable_course_home_improvements` flag.

ECOM-2604