[ToDo] ExpirationDateFlyout never opens

[rajamatt]

The navigation here silently fails:

Uno.Samples/reference/ToDo/src/ToDo/Presentation/TaskViewModel.cs

Lines 78 to 80 in 04295c6

	var result = await _navigator
	.NavigateViewModelForResultAsync<ExpirationDateViewModel, PickedDate>(this, qualifier: Qualifiers.Dialog, data: new PickedDate(task.DueDateTime), cancellation: ct)
	.AsResult();