onAboutToQuit() not work correctly

Steps to Reproduce

1. Write the following source code in main.qml and start the application.
2. Quit the application
3. onAboutToQuit() does not work

Connections {
  target: Application
  function onAboutToQuit() {
    console.log("onAboutToQuit")
  }
} 

Request

• We want onAboutToQuit() to be fixed to work correctly