connect(down, SIGNAL(clicked()), this, SLOT(MoveLevelDown()));
connect(add, SIGNAL(clicked()), this, SLOT(AddLevel()));
connect(remove, SIGNAL(clicked()), this, SLOT(DeleteLevel()));
connect(down, SIGNAL(clicked()), this, SLOT(MoveLevelDown()));
connect(add, SIGNAL(clicked()), this, SLOT(AddLevel()));
connect(remove, SIGNAL(clicked()), this, SLOT(DeleteLevel()));