- Icon images can be uploaded from the django admin
- Test coverage improved

ziafazal: improvements need for multi-tenancy
ziafazal: fixed broken tests
ziafazal: no need to add setting in test.py
ziafazal: added hostname validation
ziafazal: changes after feedback from mattdrayer
ziafazal: fixed branding and microsite broken tests
ziafazal: make STATICFILES_DIRS to list
ziafazal: added theme directory to mako lookup for tests
ziafazal: added more protection in test_util
saleem-latif: Enable SCSS Overrides for Comprehensive Theming
saleem-latif: Incoporate feedback changes, Correct test failures, add tests and enable theming for django templates
saleem-latif: Correct errors in python tests
mattdrayer: Fix invalid release reference
mattdrayer: Update django-wiki reference to latest release
saleem-latif: Update Theme storages to work with Caching, Pipeline and collectstatic
saleem-latif: Incorporate feedback changes
mattdrayer: Pylint violation fix
mattdrayer: Fix broken pavelib test

This reverts commit 954dae58.

ziafazal: improvements need for multi-tenancy
ziafazal: fixed broken tests
ziafazal: no need to add setting in test.py
ziafazal: added hostname validation
ziafazal: changes after feedback from mattdrayer
ziafazal: fixed branding and microsite broken tests
ziafazal: make STATICFILES_DIRS to list
ziafazal: added theme directory to mako lookup for tests
ziafazal: added more protection in test_util
saleem-latif: Enable SCSS Overrides for Comprehensive Theming
saleem-latif: Incoporate feedback changes, Correct test failures, add tests and enable theming for django templates
saleem-latif: Correct errors in python tests
mattdrayer: Fix invalid release reference
mattdrayer: Update django-wiki reference to latest release

ECOM-3799

It looks like in the past there used to be several tabs on the
course about page, but the other tabs have been commented
out years ago.

Having a single tab is pointless and confusing, so remove it.

Move tests to one test class

TNL-4164

TNL-3908

This will allow users to delegate permissions to a 3rd party service.

ECOM-2960

This reverts commit e8909e4439f22a7568d95a7672ab60d4a36f7322.

ECOM-2809

The existing course handouts section is moved underneath Course
Updates and News, with updated styling.

ECOM-2808

ECOM-2806

ECOM-2810

ECOM-3015

This reverts commit 46df4545, reversing
changes made to 039e6cdf.

We have some Sass files that basically generate duplicates of other
Sass files and are no longer referenced from any pages. This looks
like it might have been stuff that never got cleaned up when
comprehensive themeing was done.

List of removed files and what they were replaced by:

    application.scss ->  lms-main.scss
    application-rtl.scss -> lms-main-rtl.scss
    course.scss -> lms-course.scss
    course-rtl.scss -> lms-course-rtl.scss

This should help speed up the Sass compile.