/// <summary>
 /// Starter eller genstarter timer
 /// </summary>
 public void StartTimer()
 {
     // Sikrer at der ikke oprettes mere end én timer ad gangen
     if (TimeSinceLastKeyDownTimer != null)                                              // Hvis timer er i gang
     {
         TimeSinceLastKeyDownTimer.Dispose();                                            // Sletter timer
         TimeSinceLastKeyDownTimer = new Timer(Callback, null, 10000, Timeout.Infinite); // Opretter ny timer
     }
     else
     {
         TimeSinceLastKeyDownTimer = new Timer(Callback, null, 10000, Timeout.Infinite);  // Opretter ny timer
     }
 }
 /// <summary>
 /// Stopper timer
 /// </summary>
 public void StopTimer()
 {
     TimeSinceLastKeyDownTimer?.Dispose();
 }