Remove directions right arrow when no address is available

We've added a right arrow directions icon to detail pages. However we need to make it so this dose not display when no address is available


![screen shot 2013-05-29 at 7 41 42 pm](https://f.cloud.github.com/assets/3312529/582975/c8601d94-c8d2-11e2-8b55-dc883c7a016e.png)
.