* Swap deprecated box-sizing mixin with the box-sizing property

* Linting now that box-sizing is no longer a mixin

* Fix all stylelint errors

For any errors that fixing would require changing the output of the css disable stylelint for that line instead of modifying.

* Update quality.py

Make stylelint quality check pass when there are no errors

* Delete empty selectors

A parsing error was causing underscore template
not to get processed during message
extractions and to be available on transifex.

PROD-1504

Also removing the exclusion of link since links never have content

We want to ignore certain tags when they show up in the HTML.
This now ignores script tags and link tags (for stylesheets)

If a course welcome message is very long, cut it off with an
ellipsis and show a Show More button to reveal the full thing.

AA-46

TNL-7094 Remove auto focusing of InlineDiscussion views on load. Removing this unneeded focus management eliminates scroll issues when discussions are contain in an iframe in a parent page.

In our tests there are times when Mathjax has been initialized but
Hub is still undefied.  In this case don't queue up typesetting.

This patch would fix html editor
for adding � characters in
html attributes whenever cursor
is inside quotes. � characters
are added on save.

PROD-1076

Develop the capability to allow instructors to designate teams to have private discussions. This way, so non-teammembers cannot view discussion. And the intend is for course teams to manage the team membership as well.
MST-10