macosx: Scroll to current playlist item when playlist controller detects current item change

Signed-off-by: Claudio Cambra <developer@claudiocambra.com>

modules/gui/macosx/playlist/VLCPlaylistController.m

@@ -341,6 +341,7 @@ static const struct vlc_playlist_callbacks playlist_callbacks = {
 - (void)currentPlaylistItemChanged:(size_t)index
 {
     _currentPlaylistIndex = index;
+    [_playlistDataSource scrollToCurrentPlaylistItem];
     [_defaultNotificationCenter postNotificationName:VLCPlaylistCurrentItemChanged object:self];
 }