Aggregation: Use Qt5-style connects

Change-Id: Ifee501f2da7d2834f6ce8a63f85e9fab9c683b5d
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/libs/aggregation/examples/text/main.h

@@ -42,10 +42,9 @@ public:
 
     void add(IComboEntry *obj);
 
-private slots:
+private:
     void select(int index);
 
-private:
     Ui::mainClass ui;
 
     QList<IComboEntry *> m_entries;