Add cancel to project add and remove

A cancel button that just resets the ui to previous state. For adding/removing projects.

![screen shot 2014-07-28 at 10 28 01 pm](https://cloud.githubusercontent.com/assets/34726/3730010/129e0cb0-16c8-11e4-8328-779f105d0fcc.png)
![screen shot 2014-07-28 at 10 33 46 pm](https://cloud.githubusercontent.com/assets/34726/3730049/cb9680c6-16c8-11e4-92cb-dd98122008b3.png)