Revert "If feature flag is enabled, replace the old login/registration pages with the new combined login/registration page."

This reverts commit f40447b3.

Conflicts:
	lms/urls.py

Revert "Add support for external auth on the combined login/registration page"

This reverts commit 98875339.

Conflicts:
	lms/templates/courseware/mktg_course_about.html
	lms/urls.py

Add compare-branch option to paver run_quality

Fixed plus sign icon for overall grade range add button.

TNL-890

Refrain from setting email opt-in preference when checkbox is missing

FIX - LMS: Calculator Toggle Label Display

Add BI events for tracking email opt-ins

Conflicts:
	lms/djangoapps/mobile_api/course_info/tests.py

Make static URLs absolute in handouts, updates, and about for mobile API

Allowing email optin to work on register.

Cdodge/shopping cart touchups

Sylvia/docs/1162

Login/Registration A/B test cleanup

Fix issue with iframe redirect

Only allow users who turned 13 before this year began to opt in.

Add support for redirect URLs in third party auth for combined login/registration page

Remove old login/registration acceptance tests

Add deprecation warnings to old login and register views

Move third party auth util to student_account

Add exception for microsites

Fixed instructor dashboard tooltip far away issue.

TNL-558

Fix paver test_js task to work without -p flag

JIRA: MA-147

This reverts commit fb6579abfdb6fc9fb8bc9233554ff5c6e9215659.

JIRA: MA-147

Don't query for the user every time in FieldDataCache, just use the user_id instead

Enforce pylint violation when using old event tracker.

fix typo on course payment page (ECOM-714)