User list improvements

1. Replaced user status indicator bulb with greyed out username and pale grey background. Doing so increases space allowance for username, this means long names will abbreviated less.
![1](https://f.cloud.github.com/assets/77467/347460/f0027684-9ed0-11e2-8b83-e5a360256b00.png)

2. Increased name width allowance on smallest screen size.
![2](https://f.cloud.github.com/assets/77467/347461/f320d252-9ed0-11e2-849e-d086389924af.png)