public async void RetryAfterFail()
{
failedUnlocks++;
entry.Text = string.Empty;
entry.Placeholder = Localizer.Translate(UsePIN ? "InvalidPINTryAgain" : "InvalidPassphraseTryAgain");
entry.IsEnabled = false;
await Task.Delay(ApplicationInfo.GetUnlockDelay(failedUnlocks));
entry.IsEnabled = true;
entry.Focus();
}