fix app builder title when there are no apps

Before:

![screen shot 2014-05-16 at 5 07 14 pm](https://cloud.githubusercontent.com/assets/1757035/3002412/688ac122-dd3e-11e3-9bda-b94de81e76ad.png)

After:

![screen shot 2014-05-16 at 5 10 06 pm](https://cloud.githubusercontent.com/assets/1757035/3002421/7ec39dc4-dd3e-11e3-9373-23b1077a052c.png)