Allow scrolling playlists and playlist contents independently

[kingosticks]

If you have more playlists than can be displayed and scroll down to select one at the bottom, you then need to scroll back up to the top to see it's contents. Ideally the list of playlists and the list of tracks in the selected playlist could be scrolled independently .

[rodriguezsergio]

👍 I thought I found a bug, but it was exactly this.

[woutervanwijk]

I used iScoll for that in older versions, but it broke the responsiveness. Must take a look at that once, because I miss it too

[nickbarnwell]

@woutervanwijk are you still accepting contributions to Musicbox? I'd be happy to fix this and a few of the other outstanding issues+PRs this weekend if you're willing to CR.

[woutervanwijk]

Sure, please contribute! It's more than welcome

[kingosticks]

This is addressed as part of #86