Adding contextual styles to list-items
Active state overrides contextual list-item styles
Contextual list group cleanup

* Adds nav link to sidebar for contextual classes
* Refactors to use prefixed classes, like .list-group-item-info, instead of chained classes
* Adds default and linked variations to example in docs
Merge branch 'pr/11138'

Conflicts:
	dist/css/bootstrap.min.css
	dist/js/bootstrap.min.js
	docs-assets/js/raw-files.js
Fixes #11756: Mention document mode checking ability in IE comaptibility modes
Fixes #11729: Show code snippets on mobile views
Shorter download text because narrow viewports
prevent horizontal scroll on components
improve icon display on narrow devices
Add new template, Dashboard
Add .container-fluid variation for full-width containers and layouts

/cc #10711 #9862
Fixed some errors in the docs javascript.html
Merge branch 'master' of https://github.com/twbs/bootstrap into correction
Add new template, Cover
Merge pull request #11772 from KostyaTretyak/correction

Fixed some errors in the docs javascript.html
image compression
Merge branch 'master' of github.com:twbs/bootstrap