Follow-up to #13074: use spec syntax instead of deprecated mixins
Merge pull request #14311 from hnrch02/autoprefixer-for-13074

Follow-up to #13074: use spec syntax instead of deprecated mixins
Add docs for how to change default JS plugin settings

Closes #14250.
Merge branch 'KyleMit/add-default-settings-documentation'
Add Wall of Browser Bugs entry for #14124
[skip sauce]
Merge pull request #14315 from twbs/browser_bug_applet

Add Wall of Browser Bugs entry for #14124
fixes #14310: reset .active as well for button links
unfuck all that because lol dependencies