a bit of restyling

## Changes
- a bit of restyling to make things more compact
- clicking on labels of version now checks the boxes
- if there's no short version given (as is the case with chrome) show "latest"

![screen shot 2013-07-12 at 7 13 59 pm](https://f.cloud.github.com/assets/112170/791879/980982c6-eb59-11e2-91cf-516e352aca6c.png)