Align local nav border with other containers on desktop

## Before

![screen shot 2014-01-24 at 13 15 07](https://f.cloud.github.com/assets/85783/1994917/98587248-84f9-11e3-91a4-d5645067777a.PNG)


## After

![screen shot 2014-01-24 at 13 14 59](https://f.cloud.github.com/assets/85783/1994918/9b1cd1fe-84f9-11e3-8e87-68dec089cd9a.PNG)

![ ](http://media.giphy.com/media/UE23INMuQtGGk/giphy.gif)