fix #14254  Modal Sometimes Does Not Appear after Multiple Displays in Safari
Merge pull request #14723 from twbs/fat-fix-14254

fix #14254  Modal Sometimes Does Not Appear after Multiple Displays in S...
Fixes #14251: Don't use hidden screen reader content in docs table so that Safari doesn't screw up overflow: hidden; content
Merge branch 'master' of github.com:twbs/bootstrap
grunt
fixes #13816 Modal dialog closes when dragging and releasing mouse button outside dialog