Refine search refinements

.nav-list .nav-header { 
~~font-size: 12px;~~
font-size: 14px; 
~~font-weight: 600;~~ 
font-weight: 500; 
~~margin-bottom: 5px;~~
margin-bottom: 10px; 
margin-top: 10px;
}

![screen shot 2013-10-09 at 14 48 01](https://f.cloud.github.com/assets/109850/1297795/70d2e226-30e9-11e3-82f0-5641e6d4531f.png)