fix(settings): resolve barIsVertical property assignment conflict

CustomButtonSettings now calculates barIsVertical from Settings directly
instead of receiving it from parent, avoiding Loader.setSource() conflict.

Modules/Panels/Settings/Bar/BarWidgetSettingsDialog.qml

@@ -186,7 +186,6 @@ Popup {
       }
       settingsLoader.setSource(source, {
                                  "screen": screen,
-                                 "barIsVertical": barIsVertical,
                                  "widgetData": currentWidgetData,
                                  "widgetMetadata": BarWidgetRegistry.widgetMetadata[widgetId]
                                });

Modules/Panels/Settings/Bar/WidgetSettings/CustomButtonSettings.qml

@@ -17,8 +17,8 @@ ColumnLayout {
 
   signal settingsChanged(var settings)
 
-  // Bar orientation (per-screen) - passed from parent
-  property bool barIsVertical: false
+  // Bar orientation (per-screen)
+  property bool barIsVertical: (Settings.getBarPositionForScreen(screen?.name) === "left" || Settings.getBarPositionForScreen(screen?.name) === "right")
 
   property string valueIcon: widgetData.icon !== undefined ? widgetData.icon : widgetMetadata.icon
   property string valueIconPosition: widgetData.iconPosition !== undefined ? widgetData.iconPosition : widgetMetadata.iconPosition