Refresh score after add Element

It seems to be an interaction with the QT controls. This code adds two text items to the score. Inside the onRun, the text from makeLabel is displayed immediately. From the buttonOK, however, it will only display after major score refreshes like Save.

import QtQuick 2.0
import QtQuick.Controls 1.0
import MuseScore 1.0

MuseScore {
  id: testGUI
  pluginType: "dialog"
  menuPath: "Plugins.Test Add Element"
  height: 100
  width: 100
  onRun: {
      console.log("start");

      // the requiresScore boolean doesn't appear to work
      if (typeof curScore === 'undefined') {
        console.log("Quitting: no score");
        Qt.quit();
      }

      var cursor = curScore.newCursor();
      cursor.rewind(1); // start of selection
      if (!cursor.segment) {
        console.log("Quitting: no selection");
        Qt.quit();
      }

      makeLabel("one",0); // this displays immediately
  }

  Button {
    id: buttonOK
    text: qsTr("OK")
    width: 60
    height: 40
    anchors.top: testGUI.top
    onClicked: {
      makeLabel("onemore",2); // this does not display till save
      Qt.quit();
    }
  }
   

  function makeLabel(string,yPos) {
      var cursor = curScore.newCursor();
      cursor.rewind(1);
      var myDiag = newElement( Element.STAFF_TEXT );
      myDiag.text = string;
      myDiag.pos.y = yPos;
      cursor.add(myDiag);
  }
}