Display a top tonal border on first story on tablet to desktop

Fixes a regression introduced this morning.

## Before

![screen shot 2014-02-04 at 17 29 53](https://f.cloud.github.com/assets/85783/2078782/0e585c8a-8dc2-11e3-8af5-8c57ea98eec2.PNG)


## After

![screen shot 2014-02-04 at 17 30 12](https://f.cloud.github.com/assets/85783/2078784/10cbf1fc-8dc2-11e3-87b1-8b66f9121bd2.PNG)

![ ](http://media.giphy.com/media/YWQoG6uCrBiyQ/giphy.gif)