Shuffle: Start with random track if not selecting track directly

Starting a playlist, album or artist with shuffle enabled always
starts on the first track in it and then plays the rest of the
queue shuffled.
This changes it so unless a track is picked directly, playback
will start on a random track of the selection.

src/playlist.rs

@@ -140,7 +140,7 @@ impl ListItem for Playlist {
 
         if let Some(tracks) = self.tracks.as_ref() {
             let index = queue.append_next(tracks.iter().collect());
-            queue.play(index, true);
+            queue.play(index, true, true);
         }
     }