flatten vote buttons

before: 
![image](https://f.cloud.github.com/assets/2665886/1104384/255d96d4-18f6-11e3-8fe4-d286e0583e08.png)

after:
![image](https://f.cloud.github.com/assets/2665886/1104382/0a28e4b8-18f6-11e3-9c55-bdd4fa412ecd.png)