Implement the Weighted Problem Grade Report

Merge release into master

* Handle grading errors

LMS/Studio: Sass Build Files to Reduce Compilation Redundancy

ECOM-1531 adding the fake-page for softwar secure.

TNL-1988

API Layer.

Update version of bok-choy.

Update schoolyourself-xblock to the latest version

Conflicts:
	requirements/edx/github.txt

Fix type field in thread list endpoint

Look for a consistent css class.

Update schoolyourself-xblock to the latest version, which contains 1 commit with a cosmetic change: https://github.com/schoolyourself/schoolyourself-xblock/commit/5e4d37716e3e72640e832e961f7cc0d38d4ec47b

Add fields to threads returned by Discussion API thread list endpoint

The former class, while less-flaky, does not always appear. (For example, if cohorts
are being toggled off.) This css class always appears. Initial findings point to
flakiness being a non-issue if we look for this class.

LMS/Studio: Remove Manual Sass/CSS extend files - Take 2

Add MetricsMixin back into DescriptorSystem and ModuleSystem

Addressing RTL inconsistencies on Verification process

Adds preferences API and updates users to V1 - fix

The API's type field should come from the CS data's thread_type field,
not its type field, which distinguishes comments from threads.

This commit adds fields that are related to the requesting user's
interaction with the thread (e.g. following).

add more logging to grading

make edxnotes bok-choy tests chrome-friendly