DeliveryAncmtAdminWindow: Add option to search in all delivery schedules and init mgnr with selected

Elwig/ViewModels/DeliveryAncmtAdminViewModel.cs

@@ -14,6 +14,8 @@ namespace Elwig.ViewModels {
         [ObservableProperty]
         private bool _filterOnlyUpcoming;
         [ObservableProperty]
+        private bool _filterFromAllSchedules;
+        [ObservableProperty]
         private string? _filterSeasonString;
         public int? FilterSeason {
             get => int.TryParse(FilterSeasonString, out var year) ? year : null;