ListView can match now items belonging to nested ItemGroups

This changes introduces a 'recurse' option on ListView that allows to
match using regexp jobs contained inside folders.
The full name of the
job is matched so / can be used as separator.
This allows slice and dice of jobs contained in different folders.

![image](https://f.cloud.github.com/assets/171459/351039/582cc6c0-a038-11e2-8da3-2ff0b7add676.png)