Overwriting icon line-height

Icons were hugging the top part of the `i` tag
![hugging icons](https://cloud.githubusercontent.com/assets/3064893/2559507/36bd59fa-b77f-11e3-9117-d08114265c8a.PNG)
![corrected hugging icons](https://cloud.githubusercontent.com/assets/3064893/2559506/363821ae-b77f-11e3-8993-d827cf0a2053.PNG)