Fixed scalling issues of tie on score toolbox

- pointSize? Really?

src/qml/score/ScoreToolbox.qml

 /** This file is part of Nootka (http://nootka.sf.net)               *
- * Copyright (C) 2017-2020 by Tomasz Bojczuk (seelook@gmail.com)     *
+ * Copyright (C) 2017-2021 by Tomasz Bojczuk (seelook@gmail.com)     *
  * on the terms of GNU GPLv3 license (http://www.gnu.org/licenses)   */
 
 import QtQuick 2.9
@@ -116,7 +116,7 @@ ControlBase {
         selected: toolbox.tie
         height: factor * 1.5; width: factor * 2.7
         yOffset: (height - textHeight) / 2 - factor
-        font { family: "nootka"; pointSize: factor * 3.6 }
+        font { family: "nootka"; pixelSize: factor * 6 }
         text: "\ue18c"
         onClicked: scoreObj.checkTieOfSelected()
         onEntered: {