message: Add clarifying comment in media device selection
  Hopefully explain the confusing mismatch.
diff: @@ -157,6 +157,9 @@ export default class VoiceUserSettingsTab extends React.Component {
  label: _t('Default Device'),
  };
  const getDefaultDevice = (devices) => {
  + // Note we're looking for a device with deviceId 'default' but adding a device
  + // with deviceId == the empty string: this is because Chrome gives us a device
  + // with deviceId 'default', so we're looking for this, not the one we are adding.
  if (!devices.some((i) => i.deviceId === 'default')) {
  devices.unshift(defaultOption);
  return '';
  