MetroSearchTextBox Style

Simply copied the style and adjusted it to have a magnifying glass when there is no text. It is perfect for searchboxes.
![ms1](https://f.cloud.github.com/assets/251501/771549/f8b19a62-e8e5-11e2-8a4e-729a3d94b4e5.PNG)
![ms2](https://f.cloud.github.com/assets/251501/771550/f8c211da-e8e5-11e2-913b-1b71b032ef17.PNG)