First pass at text to playlist dialogue. Doesn't yet create playlist.
Removed some old unused IDs from resource.h
Use just one regex, and allow user to choose which index is artist/title
Generate playlist on pressing OK button on text to playlist dialogue

Overloads for generatePlaylistFromTracks to take tracks as vector
Keep best versions around in dialogue after updating output text
Slightly better default regex for text to playlist
Add status text, use it to display number of regex and library matches
todo comments
Be more lenient of Various Artists tracks in text to playlist

It's unlikely the user actually wants a track by "Various Artists" so effectively we have no artist information - in that case, only filter on title.