Remove active class from button styles

No issue

Removes any styling related to buttons with an `.active` class.
This prevent buttons having active styling when we don't want it, such as the [< Users] button in user settings

![screen shot 2014-09-09 at 10 48 03](https://cloud.githubusercontent.com/assets/390392/4199508/6ade9188-3806-11e4-89f7-a00f212264ed.png)