/// <summary>
/// Loads the content for the second pivot item when it is scrolled into view.
/// </summary>
private async void choroby_Loaded(object sender, RoutedEventArgs e)
{
var historyData = await DataSources.GetHistoryAsync();
modelManager[IllnessPivot] = historyData;
Choroby.ItemsSource = historyData;
}
