Use Adw.MessageDialog.choose()

[SoNiC-HeRE]

Close #465

[sonnyp]

Don't forget to replace

  const response = await new Promise((resolve) => {
    dialog.connect("response", (self, response) => resolve(response));
  });

in window.js - you'll need the promisify in init.js as well

[sonnyp]

100/100