UndoLoad undo = new UndoLoad(_trackInfo, inLoadedTrack.getNumPoints(), photos);
undo.setNumPhotosAudios(_trackInfo.getPhotoList().getNumPhotos(), _trackInfo.getAudioList().getNumAudios());
_undoStack.add(undo);
UndoLoad undo = new UndoLoad(_trackInfo, inLoadedTrack.getNumPoints(), photos);
undo.setNumPhotosAudios(_trackInfo.getPhotoList().getNumPhotos(), _trackInfo.getAudioList().getNumAudios());
_undoStack.add(undo);