TNL-3679

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

Also adds improved styling for course pacing settings, and unit tests
around query counts for self-paced courses.

ECOM-2650

Currently unstyled.

ECOM-2462

ECOM-2443

TNL-3679

TNL-2419

Also remove useless docstrings where they were added to keep pylint
quiet.

TNL-3297

Entrance Exam.

unit test to check presence of entrance_exam_passed

changed based on Matt's feedback

changes after Asad's feedback

Bok-Choy test added for SOL-1196 to verify no black box around view certificate note in Progress Tab

TNL-1590

TNL-2667

Trying to read the value right after setting it in the bio
field is flaky-- but nobody is using the return value
anyway! There is a test that verifies that the bio field
is properly set, but it uses a different method to get the value.

TNL-2704, TNL-3492, TNL-3514, TNL-2199

TNL-3296 would have been prevented with this test, adding it now to
prevent similar issues in the future. Squashed commit with doc changes,
review feedback, and run-20-times-to-ensure-not-flaky-then-unmark
all included.

The heart of this fix is to change the "My Team" view to use a
collection of teams instead of memberships. The team card is
refactored to only take a team, rather than attempt to be polymorphic
over teams and team memberships. This change enabled removing a good
amount of old code. This also requires adding a `username` parameter
to the teams list endpoint which allows getting a list of all teams
for a single user, in order to allow refreshing the "My Teams" view
correctly. Currently this list is of length at most one.

TNL-3410

TNL-3258 Reset group configuration model when a child content group is deleted (+5 squashed commits)
Squashed commits:
[450761c] found an alternative way to restore model when any of the nested model is deleted
[1b7eb85] passed the context to the inner functions
[c87dafd] refactored the model access using encapsulation instead of directly accessing it
[5d025ff] return the promise
[d8d1f50] fixup! quality (+1 squashed commit)
Squashed commits:
[daa7f81] reset the configuration when the model is deleted (+1 squashed commit)
Squashed commits:
[c7f41f7] reverted: skip test_can_delete_unused_content_group due to flakiness

See ticket for details.