Fixed a crash that would sometimes occur when deleting items from recycle bin (#7555)

Author: gave92

src/Files/Helpers/ItemListDisplayHelpers/BulkConcurrentObservableCollection.cs

@@ -412,7 +412,11 @@ public void OrderOne(Func<List<T>, IEnumerable<T>> func, T item)
             }
 
             Remove(item);
-            Insert(result.IndexOf(item), item);
+            var index = result.IndexOf(item);
+            if (index != -1)
+            {
+                Insert(index, item);
+            }
         }
 
         int IList.Add(object value)

src/Files/Views/PaneHolderPage.xaml.cs

@@ -144,12 +144,12 @@ public IShellPage ActivePaneOrColumn
         {
             get
             {
-                if (ActivePane.IsColumnView)
+                if (ActivePane != null && ActivePane.IsColumnView)
                 {
                     return (ActivePane.SlimContentPage as ColumnViewBrowser).ActiveColumnShellPage;
                 }
 
-                return ActivePane;
+                return ActivePane ?? PaneLeft;
             }
         }