UI improvements for ajax layout and filters

![capture d ecran 2014-10-09 a 11 03 48](https://cloud.githubusercontent.com/assets/816858/4573688/178eba84-4f95-11e4-8880-b0817449f581.png)
![capture d ecran 2014-10-09 a 11 07 44](https://cloud.githubusercontent.com/assets/816858/4573689/178f3fea-4f95-11e4-995d-1ad194f1a496.png)