Optimize ActorTreeNode reparent when it's not collapsed but one of the parents is

Source/Editor/GUI/Tree/TreeNode.cs

@@ -90,6 +90,11 @@ namespace FlaxEditor.GUI.Tree
             }
         }
 
+        /// <summary>
+        /// Gets a value indicating whether the node is collapsed in the hierarchy (is collapsed or any of its parents is collapsed).
+        /// </summary>
+        public bool IsCollapsedInHierarchy => IsCollapsed || (Parent is TreeNode parentNode && parentNode.IsCollapsedInHierarchy);
+
         /// <summary>
         /// Gets or sets the text margin.
         /// </summary>
@@ -1058,7 +1063,7 @@ namespace FlaxEditor.GUI.Tree
                     // Expand node if mouse goes over arrow
                     if (ArrowRect.Contains(location) && HasAnyVisibleChild)
                         Expand(true);
-                    
+
                     if (!_isDragOverHeader)
                         result = OnDragEnterHeader(data);
                     else

Source/Editor/SceneGraph/GUI/ActorTreeNode.cs

@@ -97,7 +97,7 @@ namespace FlaxEditor.SceneGraph.GUI
                 parentTreeNode.IsLayoutLocked = false;
 
                 // Skip UI update if node won't be in a view
-                if (parentTreeNode.IsCollapsed)
+                if (parentTreeNode.IsCollapsedInHierarchy)
                 {
                     UnlockChildrenRecursive();
                 }