Merge remote-tracking branch 'origin/master' into sdl_platform

Source/Editor/GUI/AssetPicker.cs

@@ -299,6 +299,7 @@ namespace FlaxEditor.GUI
                     {
                         // Select asset
                         Editor.Instance.Windows.ContentWin.Select(Validator.SelectedItem);
+                        Editor.Instance.Windows.ContentWin.ClearItemsSearch();
                     }
                 }
                 else if (Button1Rect.Contains(location))
@@ -312,6 +313,7 @@ namespace FlaxEditor.GUI
                     {
                         // Select asset
                         Editor.Instance.Windows.ContentWin.Select(Validator.SelectedItem);
+                        Editor.Instance.Windows.ContentWin.ClearItemsSearch();
                     }
                     else if (Button3Rect.Contains(location))
                     {

Source/Editor/GUI/Tree/Tree.cs

@@ -73,6 +73,11 @@ namespace FlaxEditor.GUI.Tree
         /// </summary>
         public bool DrawRootTreeLine = true;
 
+        /// <summary>
+        /// Occurs when the deferred layout operation was performed.
+        /// </summary>
+        public event Action AfterDeferredLayout;
+
         /// <summary>
         /// Gets or sets the margin for the child tree nodes.
         /// </summary>
@@ -375,6 +380,7 @@ namespace FlaxEditor.GUI.Tree
             if (_deferLayoutUpdate)
             {
                 base.PerformLayout();
+                AfterDeferredLayout?.Invoke();
                 _deferLayoutUpdate = false;
             }