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