Comment 10 for bug 1228789

Thank you for the work. I like your idea.
How did you make the mock up? Inside the MIxxx source?

To me this is pretty much the same than the "Point and Click Filter" from
https://launchpadlibrarian.net/106182034/mixxx-newLibraryWidget-7.svg

What about skip the preference changes and introduce "Artist", "Genre" ... as Tree items?

I do not like to introduce the word "Virtual Folder" because Mixxx has already Virtual Folders = Crates.
A "folder" implies that you can add tracks to it. IMHO Filter describes the feature better.

Later we can easily extend this feature by custom filters like:
"year:>2010 genre:dance"

http://mixxx.org/manual/1.11/chapters/djing_with_mixxx.html#djing-finding-tracks