Dash widget tidy

This PR is a general tidy-up of the dashboard widget. Before and after images attached for reference.

Before:
![dashboard-before](https://cloud.githubusercontent.com/assets/1097338/2572504/771cc0e4-b914-11e3-91bc-4d430726bd50.png)

After:
![dashboard-after](https://cloud.githubusercontent.com/assets/1097338/2572503/7715e3be-b914-11e3-9158-65552fc8381c.png)