Alphabet selector?

Just updgraded my Volumio to the latest version and it removes one of my biggest gripes and that was the forced reloads on iPad. Selected an artist, selected an album, play song, iPad goes to sleep, wake up and you had to select all over again. This is no longer the case.

As I have a large collection a selector (as in the contact list) being quickly able to select the starting letter would work well. Has anyone seen or tried to implement this? If not I will have a go myself as it should not be that complicated and mainly ui.