Customizer: Alert on successful save to Gist
Update showSuccess to use new classes
Hopefully a fix for #12364

* register the callback before invoking the toggling
* listen for `hidden` instead of `hide`
* account for the possibility of the associated `show` event being preventDefault-ed

Adds relevant unit tests.
bump grunt-contrib-qunit to ~0.5.1
bump grunt-contrib-jade to ~0.12.0
update shrinkwrap

[skip sauce] [skip validator]
Merge pull request #13731 from twbs/bump-deps

Bump dependency versions
bump grunt-saucelabs to ~8.0.2
update shrinkwrap

[skip validator]
Merge pull request #13732 from twbs/bump-sauce

Bump grunt-saucelabs to ~8.0.2
Added  directive for composer
Merge pull request #13740 from jasny/patch-composer-replace

Added rename directive for composer
Merge pull request #10632 from stuartpb/patch-1

Customizer: Alert on successful save to Gist
Tweak JSHint and JSCS checks.

Be more consistent across the whole codebase.

Also, make use of JSHint's 2.5.1 `extends` and `qunit` options. This way we set our basis options in js/.jshintrc and override the rest.
Comply to the new style.
carousel.js: remove unneeded variable assignment.

`slideIndex` is assigned to the same value a few lines above.
Minor style tweaks.
Run `grunt`.
Merge pull request #13627 from twbs/maybe-fix-12364

Hopefully fixes trigger focus restoration on modal close
Merge pull request #13388 from twbs/xhmikosr-js-style

Improve JS style