Fix navigation to detail page when canceling add review modal (bug 1071588)
Load site config API anonymously, using the CDN, and cache it (bug 1082570)
Handle old site-config API, where switches is an Object (bug 1082179)
improve CSS for site navigation bar (bug 1082161, bug 1083613, bug 1083614)

* improve navigation hover states (bug 1082161)
* use CSS instead of JS to toggle category drop-down on desktop (bug 1083613)
* add borders to desktop navigation items (bug 1083614)
* fixed CSS to actually hide the link outlines on focus