New shortcuts menu.

Hi,
I added a menu with two 
![Screenshot_2013-03-28-11-15-51](https://f.cloud.github.com/assets/2931982/312771/744d6b24-9792-11e2-990f-ebf15407bf25.png)
![Screenshot_2013-03-28-11-16-08](https://f.cloud.github.com/assets/2931982/312772/74c76622-9792-11e2-9338-5b39b930286c.png)

items acting as shortcuts to ROOT and HOME directories.