Macros: Use Qt5-style connects

The heavy lifting was done by clazy.

Change-Id: I0154e09c1a9e028f3a80772c4c07751f4e282091
Reviewed-by: Eike Ziller <eike.ziller@qt.io>

src/plugins/macros/macrooptionswidget.h

@@ -52,14 +52,12 @@ public:
 
     void apply();
 
-private slots:
+private:
     void remove();
     void changeCurrentItem(QTreeWidgetItem *current);
 
-private:
     void createTable();
 
-private slots:
     void changeDescription(const QString &description);
 
 private: