code: public Widget addControl(String name, int resId, String label, Widget.OnTouchListener listener) {
          return addControl(name, resId, label, listener, -1);
      }
docs: Add new control at the end of control bar with specified touch listener, control label and resource.
  Size of control bar is updated based on new number of controls.
  @param name name of the control to remove
  @param resId the control face
  @param label the control label
  @param listener touch listener