#480 fixed the affix style in ie

## #480 fixed the affix style in ie

Small fix for the affix sidebar in the dashboard and removed duplicate css

![screen shot 2013-10-08 at 1 42 04 pm](https://f.cloud.github.com/assets/726265/1286080/3fa26ac2-2fc3-11e3-8095-a9f4c9318e27.png)