message: select back camera on mobile
diff: @@ -6,6 +6,9 @@ import styles from './styles.scss'
  import { FormattedMessage } from 'react-intl'
  import QrReader from 'react-qr-scanner'
  +import { isMobile } from 'react-device-detect'
  +
  +
  /* eslint-disable */
  const QR = ({ openScan, handleScan, handleError }) => (
  <div styleName="scan">
  @@ -14,7 +17,7 @@ const QR = ({ openScan, handleScan, handleError }) => (
  </span>
  <QrReader
  delay={10}
  - facingMode="rear"
  + facingMode={isMobile ? `back` : `rear`}
  onError={handleError}
  onScan={handleScan}
  style={{ width: '100%' }}
  