train_prop = new TrainProperties(*this, ui_res, 0);
root->add(*train_prop);
train_prop->signal_ok.connect(sigc::mem_fun(this, &Engineer::dismiss_train_prop));
train_prop = new TrainProperties(*this, ui_res, 0);
root->add(*train_prop);
train_prop->signal_ok.connect(sigc::mem_fun(this, &Engineer::dismiss_train_prop));