Responsive UI - Cater for (admin) user list

![2](https://f.cloud.github.com/assets/77467/338423/53e756c2-9d11-11e2-81cf-3c9fa7f3825c.png)
![3](https://f.cloud.github.com/assets/77467/338424/5400d5d4-9d11-11e2-8f43-50d7e4571bd5.png)
![4](https://f.cloud.github.com/assets/77467/338422/53cdbb40-9d11-11e2-8fa4-4d6ddf4691d3.png)