QmlProfiler: Rename method in statistics model

dataChanged() was too generic and easily confused with other methods.

Change-Id: I68b8bcb609599e56a1a2d3c6cf53d878281f7818
Reviewed-by: Tobias Hunger <tobias.hunger@qt.io>

src/plugins/qmlprofiler/qmlprofilerstatisticsmodel.h

@@ -126,7 +126,7 @@ private:
     void loadEvent(const QmlEvent &event, const QmlEventType &type);
     void finalize();
 
-    void dataChanged();
+    void modelManagerStateChanged();
     void notesChanged(int typeIndex);
 
     QVector<QmlEventStats> m_data;