add "focus" to focused btns with button plugin

Fix small typo introduced in e2029e12

Add touch-action: manipulate to .btn

Major unit tests cleanup

Add collapsed default class to navbar-toggle

Merge branch 'replace-scrollspy-default-behavior-test' of git://github.com/breaddevil/bootstrap into breaddevil-replace-scrollspy-default-behavior-test

Conflicts:
	js/tests/unit/scrollspy.js

Allow tabs to fade in if no initially active pane is present

* "grunt-jscs-checker" was renamed to "grunt-jscs"
* update deps

Possible fix for #14013