Improve JS style

Hopefully fixes trigger focus restoration on modal close

`slideIndex` is assigned to the same value a few lines above.

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.

Customizer: Alert on successful save to Gist

Added rename directive for composer

Bump grunt-saucelabs to ~8.0.2

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Bump dependency versions

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Changed broken #authors anchor to #creators

add missing role="menu" attrs to .dropdown-menu elements in docs+examples

Docs audit prompted by #13697.
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Adjust for Scrollspy offset when calculating maxScroll.

Add tooltip self-reference to address #12320

Aria describedby tooltip: #13480

Bump grunt-saucelabs to ~7.0.0

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Bump glob to ^4.0.0

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show proper error message when viewing Customizer in IE8

update explanatory comment about iOS date/time inputs bug