Made spinner for synchronize pull requests to align with the button

At the moment, the spinner looks like this:

![oldspinner](https://f.cloud.github.com/assets/1220480/1780872/11d3ab56-6885-11e3-91e2-a0635d9b45d3.png)

Ive moved it into the button and it looks like this now :) :
![new spinner](https://f.cloud.github.com/assets/1220480/1780874/2b780fca-6885-11e3-8d49-fa4c9eed8610.png)