fix editorwindow keyboard event error sound (ref https://answers.unity.com/questions/1244017/error-sound-on-key-input-editorwindow-ongui.html)

com.unity.uiwidgets/Editor/UIWidgetsEditorPanel.cs

             }
             else if (evt.isKey) {
                 _wrapper.OnKeyDown(e: evt);
+                Event.current.Use();
             }
         }