Change the design of position on backlog item

Right now this looks like the following

The position is in an orange circle just to the left of the name of the backlog item

![screen shot 2013-07-20 at 10 11 35 pm](https://f.cloud.github.com/assets/100039/831261/1c25a3ee-f1c4-11e2-9889-2703f11a9f20.png)