Tweaks admin styling

Recent changes and refactoring to the admin codebase meant we lost some styling. This PR fixes those changes and cleans up a couple of the pages.

#### Before
![screenshot from 2014-01-03 10 06 46](https://f.cloud.github.com/assets/80089/1838625/5596112e-7462-11e3-8efc-935820290012.png)

#### After
![screenshot from 2014-01-03 10 12 49](https://f.cloud.github.com/assets/80089/1838626/5a619fe8-7462-11e3-8a98-530e0a43c648.png)