Added navigation buttons in the new UI ()

- Navigation buttons are back
- Tweaked color of git status / file status when selected in files view
- Tweaked git status / file status position for projects in files view

![screen shot 2014-05-21 at 4 02 51 pm](https://cloud.githubusercontent.com/assets/332168/3047865/8704a224-e13c-11e3-873d-1e4ebc89e610.png)

Fixed #1893

review: @devoncarew