Author overlay part deux

We're in the process of removing the concept of author group from the application.

https://www.pivotaltracker.com/story/show/79384948
Why does this method need to exist?  Why can you not just set the `position` directly?

![image](https://cloud.githubusercontent.com/assets/65030/4580534/fa1fb272-4fd6-11e4-8634-015a13965d35.png)