Edited product thumbnails layout

![image](https://f.cloud.github.com/assets/1321977/1972667/7a70f6e6-834c-11e3-8ce8-8da4a9c2251d.png)
![image](https://f.cloud.github.com/assets/1321977/1972674/8db48376-834c-11e3-8813-db47ce1112fa.png)