- **Activity Feed** - Activity feed has been rewritten to use `flexbox`
- **API** - API now has new settings `throttleFirstRequest` and `interruptRequests`. Interrupt requests will abort a previous request on an element when making a new request. `throttleFirstRequest`, sets whether the first request or only subsequent requests should be throttled when a `throttle` duration is specified.
- **Build Tools** - Build tools will now display pre-specified errors when a theme file is missing or an element specifies an unavailable theme.
- **Build Tools** - Adjusting `site.variables` will now rebuild all UI, instead of just `site.less`