Code cleanup and optimizing

GUT.Schedule/GUTSchedule.UWP/Controls/ClearCalendarControl.xaml.cs

@@ -0,0 +1,17 @@
+using System.Collections.Generic;
+using Windows.UI.Xaml.Controls;
+
+namespace GUTSchedule.UWP.Controls
+{
+	public sealed partial class ClearCalendarControl : ContentDialog
+	{
+		public IEnumerable<object> SelectedCalendars => targetsList.SelectedItems;
+		public bool ClearUpcomingOnly => clearUpcoming.IsChecked.Value;
+
+		public ClearCalendarControl() =>
+			InitializeComponent();
+
+		private async void ContentDialog_Loaded(object sender, Windows.UI.Xaml.RoutedEventArgs e) =>
+			targetsList.ItemsSource = await Calendar.GetCalendars();
+	}
+}