title: Sorting an Array of Objects by two Properties
body: <p>I've got an Array of Objects I want to sort by two Properties:</p>
  
  <ol>
  <li>RemindingTimestamp</li>
  <li>ModificationTimestamp</li>
  </ol>
  
  <p>Sorting order: desc</p>
  
  <p>Sorting this Object by one Property isn't the problem, but in this case I've no idea how to get it work.</p>