Give search suggestion some space

The CSS for the top-right typeahead isn't great. Not sure if the fix should be in the base theme or we should branch out in a different CSS file. Thoughts?

fixes #103

Before:
![screen shot 2014-03-27 at 4 47 17 pm](https://cloud.githubusercontent.com/assets/821842/2544952/364f3a68-b60a-11e3-825f-ef783a14777e.png)

After:
![screen shot 2014-03-27 at 4 47 03 pm](https://cloud.githubusercontent.com/assets/821842/2544953/36532eb6-b60a-11e3-8a27-277eebbdcea1.png)