Add padding to search input

Hi, noticed a small glitch with the search input decided to fix it. Was a nice learning experience about the dev process for cozy

Before
![screenshot from 2014-03-25 14 24 00](https://f.cloud.github.com/assets/810040/2511443/707c99cc-b418-11e3-97ec-7a13c006456d.png)
After
![screenshot from 2014-03-25 14 24 08](https://f.cloud.github.com/assets/810040/2511442/707c54da-b418-11e3-97d4-515032dc8ee5.png)