@UiHandler("addCommandButton")
protected void addCommand(ClickEvent event) {
FormStylePopup addCommandPopup = new FormStylePopup();
addCommandPopup.setTitle(Constants.INSTANCE.AddCommandPopupTitle());
addCommandPopup.setWidth("400px");
addCommandPopup.addRow(new AddCommandWidget(addCommandPopup, step, simulationTestEventHandler));
addCommandPopup.show();
}