Merge pull request #17559 from edx/ri/EDUCATOR-2231-remove-enrollment-dates-references

EDUCATOR-2231 remove course run enrollment dates references from studio

add NoTextbooks component

make backbone-associations work

webpackify context course

test fixup

EDUCATOR 2190: Course card resume buttons on the student dashboard.

Bump SFE to 1.3.5 (increase file upload count)

Update base.txt

Configurable XSS-linter

PLAT-1989 Upgrade django-openid-auth for Django 1.11 fix

Update min length of financial assisstance

LEARNER-2945

Course outline styling

EDUCATOR-2419 No upgrade deadline for professional courses

Refactor XSS Linter into smaller files

Replace main tag with div to compliance HTML5 standard

updated-translations

Fix css issues on oauth authorization page to make it responsive

Course outline page uses two main tags that violates modern
HTML5 standard that recommends only single main tag on a webpage.
To make it compliance with modern standard the enclosing main tag
is replaced with div which will improve accessibility.

LEARNER-4233

update edx-proctoring package

PLAT-1976 Add waffle switch to block auth_user write attempts

Reduce escaping on sandbox errors returned to learners

Add mismatched parenthesis detection to formula parsing

Return expected Dict when Discovery API fails or returns nothing

LEARNER-4100: Assume the cookie is set and don't try to get it again.

Revert "Revert "Revert "Merge pull request #17325 from cpennington/switch-ass…"

Bok Choy tests for studio-frontend assets page