Keep display scaling options consistent

shell/plugins/panels/monitor/Panel.qml

@@ -263,6 +263,15 @@ Panel {
     return -1
   }
 
+  function effectiveScale(scale) {
+    for (var i = 0; i < displays.length; i++) {
+      var display = displays[i]
+      if (display && display.focused)
+        return Model.cleanScale(scale, display.width, display.height)
+    }
+    return normalizeScale(scale)
+  }
+
   // Playful mood-name for a given brightness percent. Bands intentionally
   // span ~10–20 points so casual tweaks change the label, while small
   // nudges within one band don't.
@@ -781,7 +790,7 @@ Panel {
     required property string scaleValue
     required property int scaleIndex
 
-    text: scaleValue + "x"
+    text: root.effectiveScale(scaleValue) + "x"
     fontSize: Style.font.caption
     foreground: root.bar.foreground
     fontFamily: root.bar.fontFamily