Custom WORK/PART tag editing and use

Thank you, thank you, thank you! This is fixed in 234 to allow me to add appropriate tags and merge certain popular music songs on certain popular music albums into single works that can be played like I would play them on an album, but to be played that way during shuffle and radio play. Big smile and sigh of relief here.

Kudos, props, thumbs-up, etc. to the devs for making this happen!