Fix download button padding.

It's this by design or should we fix it?

![screenshot 2014-06-21 22 05 01](https://cloud.githubusercontent.com/assets/1000669/3348987/13a1e804-f94d-11e3-82ae-4a3361f05de8.png)

![screenshot 2014-06-21 22 04 52](https://cloud.githubusercontent.com/assets/1000669/3348988/13a4ad46-f94d-11e3-934f-ffcab18941d9.png)