* 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
remove unnecessary parentheses
change css properties for mixins bi-aap in login/register page
change css properties for mixins bi-app in about course page
change css properties for mixins bi-app in the dashboard
change css properties for mixins bi-app in help template
change css properties for mixins bi-app in the home page
change css properties for mixins bi-app in jobs, press and media pages
remove the extra spaces
- Doubled up :hover and :focus styling to improve a11y
- Increase contrast of certain UI elements for improved a11y
- Added some image alt text for a11y
- Changed video caption styling to blue and made them underline on hover and added a skip link before video for screenreaders.
Fixes Bugs:
- LMS-1336