tweaks to the find box

Some find box css tweaks (@umop). Old:

![screen shot 2014-05-01 at 11 15 30 am](https://cloud.githubusercontent.com/assets/1269969/2855454/a8779294-d15c-11e3-9e4b-46ecda2e03c7.png)

new:
![screen shot 2014-05-01 at 11 14 04 am](https://cloud.githubusercontent.com/assets/1269969/2855457/ae27380c-d15c-11e3-8baf-d10cb7f248cd.png)
![screen shot 2014-05-01 at 11 15 01 am](https://cloud.githubusercontent.com/assets/1269969/2855458/ae381816-d15c-11e3-9075-9a1aca080975.png)