fix(ripples): Fixes the ripples not clearing

Before:

![buttons](https://cloud.githubusercontent.com/assets/2179222/4838035/2da55adc-5fe2-11e4-86d1-b6de14b35016.gif)


After:

![n-buttons](https://cloud.githubusercontent.com/assets/2179222/4838037/327a2f2e-5fe2-11e4-8166-a2be1cb207a5.gif)