Discussion formatting improvements

![screenshot from 2014-06-25 16 38 08](https://cloud.githubusercontent.com/assets/383630/3387487/c79fcf68-fc7e-11e3-85b8-6ad19d7cd7b7.png)

`u-h` is for hiding stuff that you want to keep keyboard and screen reader accessible, not for hiding parts of the UI.

Is that the intended use here?