Disable flaky JS FileUploader SystemFeedback and NotificationView tests
TNL-559
Create Donation order item
Add tax-deductible messaging to the confirmation email and receipt pages.
Update receipt page to make the course URL optional
Merge pull request #5482 from edx/will/cybersource-donations

CyberSource donations (back-end)
Changed default post type to discussion.
Merge pull request #5480 from edx/jmclaus/change-default-post-to-discussion

Changed default post type to discussion.
Info for moderators
Merge pull request #5492 from edx/ahodges/doc/cohort_discuss

Info for moderators
Consequences of changing configuration
Merge pull request #5493 from edx/ahodges/doc/nochanges

Consequences of changing configuration
Merge pull request #5485 from edx/zoldak/disable-flaky-js-tests

Disable flaky JS FileUploader SystemFeedback and NotificationView tests
Adding new styles for dashboard notifications.

Change the reverification failure message styling.

Changing templates so new styles do not appear in courseware.

Removing unused aria tag.

PR comments on cleaning up SASS

Fix signup LMS test.

Copy changes per review on PR

Updating based on PR comments

Style and HTML changes for notifications
Update to use UTC time in course dates
Merge pull request #5440 from edx/markhoeber-doc1060

Update to use UTC time in course dates
Merge pull request #5497 from edx/sanchez/update-message-styles

Adding new styles for dashboard notifications.
Revert "Update to use UTC time in course dates"
Merge pull request #5506 from edx/revert-5440-markhoeber-doc1060

Revert "Update to use UTC time in course dates"
Add LMS Performance tests (TNL-484).
Fix pep violations.
Improve code.
REVERT BEFORE MERGE.