Fix window focus issue when removing actors

Source/Editor/Modules/SceneEditingModule.cs

@@ -383,6 +383,7 @@ namespace FlaxEditor.Modules
             var objects = Selection.Where(x => x.CanDelete).ToList().BuildAllNodes().Where(x => x.CanDelete).ToList();
             if (objects.Count == 0)
                 return;
+            var isSceneTreeFocus = Editor.Windows.SceneWin.ContainsFocus;
 
             SelectionDeleteBegin?.Invoke();
 
@@ -404,6 +405,9 @@ namespace FlaxEditor.Modules
             SelectionDeleteEnd?.Invoke();
 
             OnDirty(objects);
+
+            if (isSceneTreeFocus)
+                Editor.Windows.SceneWin.Focus();
         }
 
         /// <summary>

Source/Editor/Windows/PropertiesWindow.cs

@@ -29,6 +29,7 @@ namespace FlaxEditor.Windows
         : base(editor, true, ScrollBars.Vertical)
         {
             Title = "Properties";
+            AutoFocus = true;
 
             Presenter = new CustomEditorPresenter(editor.Undo);
             Presenter.Panel.Parent = this;