Fixed alignment position of help drop down for IE

Before: right white margin that moves the entire layout
![before](https://cloud.githubusercontent.com/assets/458523/3979888/5f0e492c-285a-11e4-94f0-77cbcf8bfa8f.png)


After:
![after](https://cloud.githubusercontent.com/assets/458523/3979890/659fc180-285a-11e4-82d2-f8fcf7f97e7f.png)