Added courseware API for retrieving the last completed block

Don't assume due dates on sections

The content highlights code assumed due dates existed on all
sections. But we recently broke that assumption. So now we
recalculate the spread of sections across the expected duration
ourselves rather than rely on due dates.

Adding logs in capa_base

not sure why we are getting errors here, but they shouldn't stop peop…

* Updating Python Requirements

* Constrain django-cookies-samesite until dep bug fixed

* Fix PEP 8 problems revealed by pycodestyle upgrade

Co-authored-by: Tim McCormack <tmccormack@edx.org>
Co-authored-by: Jeremy Bowman <jbowman@edx.org>

Dates Intro Messaging

Adds more logging to course updates task

Check contentlibrary permissions only if user is logged in

Added a banner to introduce learners to the Dates Tab.
The banner is hidden when the learner has missed deadlines.

Refactored naming conventions in the dates sass file to better
reflect the function of our banners.

AA-156

AA-157 dates page missed deadlines

Fixed  xss lint violations

PROD-1579

Add python 3.8 and django30 to tox.ini and remove django111, django20, and django21 tox environments

ENT-2788 Upgrading edx-enterprise

Remove all references to the shoppingcart app from the course about page. Also removed one test of shoppingcart functionality from the student app.

MICROBA-311 Add US State field to UserProfile

Add list of states and field to UserProfile model; add migration; add
state field to relevant serializers and to
ACCOUNT_VISIBILITY_CONFIGURATION. Removes state data if country is
changed to something other than United States.

- add banner to dates page when deadlines are missed

Remove Shorten Welcome Message flag

Add financial assistance link in course tools where available, so this will be more visible to learners

Fixes serialization of course key for celery in course updates command

AA-163: Fixes duplicate dates tab issue

Course Content boilerplate blurb (and link to discussions)

* Have separate column for transcript and encode status
* Display error message sent from VEM

PROD-1432

PROD-1475