Fix icon in subnav

Before
![screen shot 2014-10-20 at 13 56 48](https://cloud.githubusercontent.com/assets/1152640/4700714/60700a8c-5850-11e4-8171-c5173bec640c.png)

After
![screen shot 2014-10-20 at 13 57 30](https://cloud.githubusercontent.com/assets/1152640/4700702/4db33428-5850-11e4-93f8-ef311edc66c5.png)