[master] Remove margin top on approve and deny to align with other butto...

...ns

Changes the look from 
![screen shot 2014-12-01 at 1 56 04 pm](https://cloud.githubusercontent.com/assets/6703966/5240857/273140e0-7963-11e4-8a95-e90af2303417.png)
to
![screen shot 2014-12-01 at 2 03 42 pm](https://cloud.githubusercontent.com/assets/6703966/5240855/1552849c-7963-11e4-9d33-76d06c9e6247.png)