OC 2.0.0.1b: Fixed notifications drop down in admin header

Before:

![2014-10-19 19_58_38-products](https://cloud.githubusercontent.com/assets/8582633/4693936/f6df112c-57b3-11e4-87f8-64607c5f4141.png)

After:

![2014-10-19 20_14_39-modifications](https://cloud.githubusercontent.com/assets/8582633/4693937/f6e2fc42-57b3-11e4-8c5b-2b045f77b566.png)