Add correct class to right hand popular component

### Before
![screenshot from 2014-02-10 14 04 47](https://f.cloud.github.com/assets/80089/2126160/23850036-925e-11e3-8c64-e485c943979b.png)

### After
![screenshot from 2014-02-10 14 09 08](https://f.cloud.github.com/assets/80089/2126162/25492230-925e-11e3-89fd-2e9c9ccca3c9.png)