Fix delayed item display bug (#2390)

Author: lukeblevins

Files/Helpers/BulkObservableCollection.cs

@@ -1,20 +1,21 @@
 using System.Collections.ObjectModel;
 using System.Collections.Specialized;
+using Windows.ApplicationModel.Core;
 
 namespace Files.Helpers
 {
     public class BulkObservableCollection<T> : ObservableCollection<T>
     {
-        private bool _isBlukOperationStarted;
+        private bool _isBulkOperationStarted;
 
         public void BeginBulkOperation()
         {
-            _isBlukOperationStarted = true;
+            _isBulkOperationStarted = true;
         }
 
         protected override void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
         {
-            if (!_isBlukOperationStarted)
+            if (!_isBulkOperationStarted)
             {
                 base.OnCollectionChanged(e);
             }
@@ -23,7 +24,7 @@ protected override void OnCollectionChanged(NotifyCollectionChangedEventArgs e)
         public void EndBulkOperation()
         {
             base.OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
-            _isBlukOperationStarted = false;
+            _isBulkOperationStarted = false;
         }
     }
 }