Fix responsive breakpoint on search results page.

Fixes #280 


#### Before
---
![before-responsive](https://cloud.githubusercontent.com/assets/96776/3560814/32f70408-098f-11e4-9c1f-016652aefd84.gif)

#### After
---
![after-responsive](https://cloud.githubusercontent.com/assets/96776/3560815/38c74b7c-098f-11e4-8e26-002af03bbfbf.gif)