Fixed code to use Rows instead of _rows.

Author: goran-w

src/Views/RevisionFileTreeView.axaml.cs

@@ -300,7 +300,7 @@ protected override async void OnPropertyChanged(AvaloniaPropertyChangedEventArgs
                 var selectedNode = _revisionFileRowsListBox?.SelectedItem as RevisionFileTreeNode;
 
                 var expandedObjects = new List<Models.Object>();
-                foreach (var node in _rows)
+                foreach (var node in Rows)
                 {
                     if (node.IsExpanded)
                     {
@@ -349,24 +349,24 @@ protected override async void OnPropertyChanged(AvaloniaPropertyChangedEventArgs
             }
         }
 
-        private void RestoreTreeState(List<Models.Object> expandedObjects, RevisionFileTreeNode selectedNode)
+        private async void RestoreTreeState(List<Models.Object> expandedObjects, RevisionFileTreeNode selectedNode)
         {
-            for (int i = 0; i < _rows.Count; i++)
+            for (int i = 0; i < Rows.Count; i++)
             {
-                var revisionFileTreeNode = _rows[i];
+                var revisionFileTreeNode = Rows[i];
 
                 if (!revisionFileTreeNode.IsFolder)
                     continue;
 
                 if (expandedObjects.FirstOrDefault(o => o.SHA == revisionFileTreeNode.Backend.SHA || o.Path == revisionFileTreeNode.Backend.Path) != null)
                 {
-                    ToggleNodeIsExpanded(revisionFileTreeNode);
+                    await ToggleNodeIsExpandedAsync(revisionFileTreeNode);
                 }
             }
 
             if (selectedNode != null)
             {
-                foreach (var node in _rows)
+                foreach (var node in Rows)
                 {
                     if (node.Backend.SHA != selectedNode.Backend.SHA && node.Backend.Path != selectedNode.Backend.Path)
                         continue;