Update facet remove glyphicon alignment and add hover state

Before:

![screen shot 2014-11-11 at 2 24 02 pm](https://cloud.githubusercontent.com/assets/111218/5001779/6f7140b8-69ae-11e4-81f4-5c3ee051d4ac.png)

After (on hover):

![screen shot 2014-11-11 at 2 22 50 pm](https://cloud.githubusercontent.com/assets/111218/5001770/5c45485e-69ae-11e4-8011-da8bdc13902a.png)