Kwixer - fix review button cut off on mobile screens

Fix for issue #885 

//cc @jagtalon @jdorweiler 

Mobile view 320x480:
![screen shot 2014-09-01 at 15 07 52](https://cloud.githubusercontent.com/assets/3652195/4348571/fb2082e4-4191-11e4-9f8e-c7b4389cc216.png)