ia.css: Add padding-left to the list of the IAs.

Before:
![screen shot 2014-12-15 at 9 55 18 am](https://cloud.githubusercontent.com/assets/81969/5437764/996ac900-8440-11e4-943a-e37c430db1cb.png)

After:
![screen shot 2014-12-15 at 9 55 23 am](https://cloud.githubusercontent.com/assets/81969/5437765/996c271e-8440-11e4-8db5-bbe9c8dce788.png)