Clumsy fingers

Making the hit targets a bit bigger and a bit more obvious for the scrolling checkbox lists:

![screen shot 2014-11-21 at 17 23 32](https://cloud.githubusercontent.com/assets/68009/5163913/d5b093c8-73c8-11e4-9805-a69334d48371.png)


Is this just so it is the same as border colours? If so there is the `$border-colour` variable