Extend button width

![menubar_before](https://cloud.githubusercontent.com/assets/3356474/3699082/1925d7ea-13ce-11e4-9e43-1024a16b52dd.jpg)
->
![menubar](https://cloud.githubusercontent.com/assets/3356474/3699083/1a30d108-13ce-11e4-98e6-35a90054a31e.jpg)