Rejecting call

It's not best, looks (very) ugly, but well... it's something. Ideas how to improve it are welcomed.

![reject button](https://cloud.githubusercontent.com/assets/2544251/5229869/a68fdde2-7715-11e4-94d1-89a94f0a5c17.png)

Technically, it can be merged if you're not disgusted with that.