Identify media by UID instead of mount point

Submitted by Nicholas Allen

Description

Please describe the problem: I have all my music collection on a removable USB hard disk and if the disk is mounted and unmounted while rhythmbox is loaded, rhythmbox used to hide and display the tracks. This was one of the coolest things of rhythmbox and the only music player that handled music on a removable drive properly. Unfortunately, in the HEAD version (which used to work a few days ago) this no longer happens.

Steps to reproduce:

Have collection on removable media
Mount/unmount the drive while rb loaded
Look at the library and see if the relavant songs are hidden or shown as appropriate

Actual results: When I unmount the songs still appear in the library even though they are no longer available. If not mounted when started the library is empty and then mounting does not make the songs appear.

Expected results:

Does this happen every time? yes

Other information:

Version: HEAD