Bugfix/double compares

Fixes two AB compare bugs

1. No longer shows *two* new compares in the list of compares after adding one. 
2. Compare thumbnails on a new compare are no longer broken

...also includes updates from bs3 pr...
![m1hb-sx8](https://cloud.githubusercontent.com/assets/2860813/4125856/acfb51c6-32e5-11e4-9b44-82d20d08b6fc.jpeg)