Un highlight invalidated example options on edit

Worst title for a PR ever. 

Basically, we highlight invalidated selected options in examples so you can find them. This extra listener will allow those highlighted fields to go back to normal when changed.

Behold. 
![image](https://cloud.githubusercontent.com/assets/235752/3707709/99222f74-1438-11e4-906b-3de49f2d70d5.png)

![image](https://cloud.githubusercontent.com/assets/235752/3707713/9ca1cc4a-1438-11e4-8490-2523273ef589.png)


@wedaly @gradyward