Source list cleanup

Moves source list actions to right, adds labels:
![screen shot 2014-03-07 at 4 08 48 pm](https://f.cloud.github.com/assets/108094/2362411/95318586-a63d-11e3-9a35-993c4b131e8d.png)
![screen shot 2014-03-07 at 4 09 11 pm](https://f.cloud.github.com/assets/108094/2362412/95319ff8-a63d-11e3-9bc2-f1885aa2be8b.png)

Adds notice after making changes:
![screen shot 2014-03-07 at 4 14 35 pm](https://f.cloud.github.com/assets/108094/2362405/85c8341e-a63d-11e3-8b2c-ae779cd76736.png)