QmlDesigner: Fix base state update

Task-number: QDS-7799
Change-Id: I89216cdb8fb641e6b51c22b32e6a845e7952c601
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Thomas Hartmann <thomas.hartmann@qt.io>

src/plugins/qmldesigner/components/stateseditornew/stateseditormodel.cpp

@@ -95,6 +95,7 @@ void StatesEditorModel::reset()
     QAbstractListModel::endResetModel();
 
     evaluateExtend();
+    emit baseStateChanged();
 }
 
 QVariant StatesEditorModel::data(const QModelIndex &index, int role) const

src/plugins/qmldesigner/components/stateseditornew/stateseditorview.h

@@ -122,7 +122,6 @@ public slots:
     void removeState(int nodeId);
 
 private:
-    StatesEditorWidget *statesEditorWidget() const;
     void resetModel();
     void resetPropertyChangesModels();
     void resetExtend();