Add BackgroundView and OEScroll bar to the Libraries list in Preferences


Add Background View and OEScroll bar to the Libraries list in
Preferences. Window margins and OEScroll bar are not perfect...

![image 2013 12 01 15-46-59](https://f.cloud.github.com/assets/1577800/1650574/72a7446a-5a98-11e3-818e-1c71cea0d64d.png)