Fix regression from 21e2c830e5 when reimport Animation

#3937

Source/Editor/Windows/Assets/AnimationWindow.cs

@@ -431,6 +431,9 @@ namespace FlaxEditor.Windows.Assets
             _isWaitingForTimelineLoad = true;
 
             base.OnItemReimported(item);
+
+            // Drop virtual asset state and get a new one from the reimported file
+            LoadFromOriginal();
         }
 
         /// <inheritdoc />

Source/Editor/Windows/Assets/AssetEditorWindow.cs

@@ -527,6 +527,16 @@ namespace FlaxEditor.Windows.Assets
             return false;
         }
 
+        /// <summary>
+        /// Loads the asset from the original location to reflect the state (eg. after original asset reimport).
+        /// </summary>
+        protected virtual void LoadFromOriginal()
+        {
+            _asset = LoadAsset();
+            OnAssetLoaded();
+            ClearEditedFlag();
+        }
+
         /// <inheritdoc />
         protected override T LoadAsset()
         {