Qualify shell palette references for Qt 6.12 (#14553)

shell/Ui/OpticalGlyph.qml

@@ -1,5 +1,6 @@
 import QtQuick
 import qs.Commons
+import qs.Commons as Commons
 
 Item {
   id: root
@@ -7,7 +8,7 @@ Item {
   property string text: ""
   property string fontFamily: Style.font.family
   property real fontSize: Style.font.body
-  property color color: Color.foreground
+  property color color: Commons.Color.foreground
   property bool debugBounds: false
 
   readonly property int renderedFontSize: Math.max(1, Math.round(fontSize))