* First take at forcing a subsection's grade to update when a signal is
  sent that a problem's score has changed
* Refactor signal handler connection.
* Expand bokchoy tests to cover progress page
* Add some grading unit tests

TNL-5394
TNL-5364

TNL-5274

https://openedx.atlassian.net/browse/TNL-5041

Adds a context-sensitive link to learner documentation from the LMS. The base URL defaults to Open edX learner doc and can be overridden with the base URL for edx.org learner doc.  Also relabels the tab for support from help to support.

clear request cache to avoid memory leak

update to use https

delete courses in the same transaction as writing them

python3 compatibility

Also make sure we set the recommended settings according to
<https://django-debug-toolbar.readthedocs.io/en/stable/installation.html#explicit-setup>

ECOM-5303

Hooks the pre-existing grades code into our new PersistentSubsectionGrade data
model. Includes test updates, and some minor changes to the data model that
were discovered in testing.

Introduces database models and simple CRUD interface for robust grading
usage.

updated LMS footer to include year in copyright message

Adds ENABLE_SUBSECTION_GRADES_SAVED feature flag to both lms and cms. Also
installs the wiring that will allow robust grades to be used for courses
that enable it. This functionality is still gated by the feature flag
and should not be used until the remaining robust grades work is finished.

2. Add site configuration overrides to theming/helpers.py
3. Move microsite.get_value from theming/helpers to site_configuration/helpers
4. Move microsite_configuration.microsite.get_value usages to site_configuration.helpers.values

An important step towards being able to use Studio's program editor out of the box. Part of ECOM-4638.

https://openedx.atlassian.net/browse/TNL-5008

TNL-4670

Part of ECOM-4566.

Remove edx-icons from edx-platform - TNL-4813
Remove edx-icons from LMS - TNL-4952
comment out baseline screenshot Bokchoy assertion tests
SOL-1937 Temporarily comment out baseline screenshot Bokchoy assertion tests

This is the first in a series of commits that will retrieve and use data from the catalog API. Part of ECOM-4566.

Also allows dynamic updates.
TNL-4668

Refactor all S3 code to use the django storage API and add swift
settings for openstack deployments

2. Update COMPREHNSIVE_THEME_DIR to COMPREHENSIVE_THEME_DIRS
3. Update paver commands to support multi theme dirs
4. Updating template loaders
5. Add ENABLE_COMPREHENSIVE_THEMING flag to enable or disable theming via settings
6. Update tests
7. Add backward compatibility for COMPREHEHNSIVE_THEME_DIR

Performance improvement, this cache is no longer needed thanks
to block_structure caching data.

TNL-4874

ECOM-4792