message: alert to console.warn if desktop notifs not supported
diff: @@ -67,7 +67,7 @@ async function createIfNotExists (doc, contentType = 'text/turtle', data = '') {
  function desktopNotification (str) {
  // Let's check if the browser supports notifications
  if (!('Notification' in window)) {
  - alert('This browser does not support desktop notification')
  + console.warn('This browser does not support desktop notification')
  } else if (Notification.permission === 'granted') {
  // Let's check whether notification permissions have already been granted
  // eslint-disable-next-line no-new
  