Fix form-control-feedback position when label has sr-only class
Fix indent
added bower reference to main less file
Add documentation for using optional icons with sr-only labels
Update type.less

For better readability on mobile devices
Merge pull request #13449 from sejr/master

Increase .lead font-weight for better readability on mobile
grunt dist
Merge pull request #13328 from thebigredgeek/master

Added bower reference to main less file
explain
grunt dist
Merge branch 'pr/13320'

Conflicts:
	dist/css/bootstrap-rtl.min.css
	dist/css/bootstrap.css.map
	dist/css/bootstrap.min.css
	docs/dist/css/bootstrap-rtl.min.css
	docs/dist/css/bootstrap.css.map
	docs/dist/css/bootstrap.min.css
document grid column wrapping behavior; fixes #13247
Merge pull request #13434 from twbs/fix-13247

document grid column wrapping behavior; fixes #13247