LEARNER-1279: Revert: Course jump tos should go to the main course home page.

update ORA2 to 1.4.1

[ENT-386] Styling Issues on new registration page

[ENT-378] Remove code for custom header logo

EDUCATOR-62 Fix question text wrapping in IE11

Add instructions.

LEARNER-859: Updating styling on the course updates page

Revert commit: c14f0b14

Mark test as flaky, and remove flaky from a fixed test.

Fix for LEARNER-859: Updating styling on the course updates page to more clearly differentiate between multiple updates. Specifically:
- Updated styling on date in the top left corner
- Added horizontal line between updates
- Removed ability to toggle updates on and off
- Cleaned up code to always show all updates:

LEARNER-881: Per-course rollout configuration model

EDUCATOR-511

More specific grade_course logging

Sstudent/course policy event

More celery logging

Mask grades on progress page according to show_correctness setting

Fix the activation email support link in the dashboard sidebar

Defaulting to a plaintext response makes no sense for an endpoint that is intended to be used by machines for testing. The endpoint now returns JSON only unless a redirect action is triggered.

[ENT-381] Conform to WCAG 2 AA contrast minimums for Google OAuth.

LEARNER-923 Make Pattern Library support tabs transparent

Christina/ed 427 again

EDUCATOR-396

Django Signal Handler for GRADING_POLICY_CHANGED

https://openedx.atlassian.net/browse/EDUCATOR-393

Reorder Studio imports using isort

Reorder imports using isort (except lms and cms)