Extras Install Button Style Fix

**Before**
![extras-install-btn-bad](https://cloud.githubusercontent.com/assets/114390/3546704/7486ad7c-0888-11e4-9317-5851087c8745.png)

**After**
![extras-install-btn-fix](https://cloud.githubusercontent.com/assets/114390/3546706/798c6a1e-0888-11e4-9a94-5f45d0821757.png)