message: fix(omemo): qr code without devices
diff: @@ -88,6 +88,7 @@ class OmemoDeviceDialog {
  private async insertDevices(devices: Device[], identityManager: IdentityManager, listElement) {
  if (devices.length === 0) {
  listElement.empty().append($('<p>').text(Translation.t('No_devices_available')));
  + listElement.prev('.jsxc-qr-code').remove();
  return;
  }
  