Only show services link when necessary

https://www.pivotaltracker.com/story/show/77112094

Before:
![screenshot 2014-09-17 07 41 10](https://cloud.githubusercontent.com/assets/109225/4299382/c2a7a3ca-3e35-11e4-86d5-3c3de04f3075.png)

After:
![screenshot 2014-09-17 07 40 34](https://cloud.githubusercontent.com/assets/109225/4299383/c7f3d4f2-3e35-11e4-9587-cf7a3496022a.png)