QmlDesigner.propertyEditor: a border can only be added in base state

share/qtcreator/qmldesigner/propertyeditor/Qt/RectangleColorGroupBox.qml

@@ -112,6 +112,15 @@ GroupBox {
             showButtons: true;
 
             backendColor: backendValues.border_color
+            
+            property variant backendColorValue: backendValues.border_color.vlaue
+            enabled: isBaseState || hasBorder
+
+
+            onBackendColorValueChanged: {
+                if (backendValues.border_color.isInModel)
+                    borderColorBox.setNoneButtonChecked = true;
+            }
 
             onNoneButtonCheckedChanged: {
                 if (isSetup)