Add link from notification to consent form

Adds the "what is this?" button here, which takes you back to the consent form:

![screen shot 2014-10-21 at 10 13 06 pm](https://cloud.githubusercontent.com/assets/4962198/4731490/06ab6080-59ab-11e4-8d61-9935e3c4c29d.png)
just buttonIndex === 1 is fine