Make input lists stop users entering more than 10 items


![image](https://cloud.githubusercontent.com/assets/87140/4526525/0d841a66-4d60-11e4-9e3a-3d2d169c79e7.png)

Removes the 'add' button at the bottom when you get to 10 fields:

![image](https://cloud.githubusercontent.com/assets/87140/4526534/21975f5e-4d60-11e4-9708-03581bc9106f.png)