Consider centering vertical alignment of "This comment has been deleted"

![screen shot 2014-03-19 at 12 14 53 pm](https://f.cloud.github.com/assets/102265/2462476/a63fc00c-af81-11e3-8d94-8ce35b23bbbf.png)

Doing this would be consistent with notifications list items and "details" list items as well I think.