/* Let the user select a track from a list.
seq = Moosique.getSequence();
seq.deleteTrack(seq.getTracks()[NUMBER]);
*/
} else if (command == "Copy track...") {
/* Let the user select a track from a list.
seq = Moosique.getSequence();
seq.deleteTrack(seq.getTracks()[NUMBER]);
*/
} else if (command == "Copy track...") {