ENT-388 Fix formatting issues with LMS account activation email.

This removes extra whitespace in the body of the LMS account activation email.

ENT-388

Add single retry to compute_grades tasks.

400 for non-rescorable blocks

Learners should be able to enroll in future runs of courses in which they have an expired enrollment. Previously, the course card model populated itself by selecting the first course run in which the user was enrolled. When the user tried to enroll in another run, nothing would happen because they were already enrolled in the run the page was trying to enroll them in.

Instead of blindly choosing the first run in which the user is enrolled, we now fall through to the same behavior we use for courses in which the user is not enrolled when the user has expired enrollments.

LEARNER-933

Implement GPC signal

EDUCATOR-312 Remove flaky decorator from test_timed_exam_flow.

EDUCATOR-278 Remove flaky decorator from test_can_reset_attempts.

Condense view logic left over from removal of Waffle switch.

ECOM-6602

The new page is released and stable. The switch and old code are no longer necessary.

ECOM-7482

Update version of proctoring.

EDUCATOR-396

ENT-359 Bump enterprise package version

fix for issue where emails to students in one track are sent to users…

Fix the actual template we use

Register compute grades task in CMS

Support fallback to supported language variants in the footer

Capture the language preference set by an anonymous user when the reg…

fix for issue where emails to students in one track are sent to users in other tracks, too (EDUCATOR-217)

Move matplotlib to post requirements.

Fix RTL video player and subtitles misplacement in full screen

[LEARNER-168]

EDUCATOR-217-364 add logs in bulk email

ENT-374 Ticket should be created without enterprise tags for anonymous users 

The course and program dashboards interpret an empty upgrade deadline to mean that a given seat is available. Previously, program dashboard pages interpreted empty upgrade deadlines to mean that a given seat was not available.

LEARNER-935

https://openedx.atlassian.net/browse/EDUCATOR-388

Update xblock requirement