Use new signal/slot connect

source/RobotAPI/gui-plugins/RobotUnitPlugin/QWidgets/NJointControllerClassesWidget.cpp

@@ -316,7 +316,7 @@ namespace armarx
                 QPushButton* button = new QPushButton {"Create"};
                 headerW->layout()->addWidget(button);
                 button->setToolTip("Create a new controller instance of this class");
-                connect(button, SIGNAL(clicked(bool)), this, SLOT(createCtrl()));
+                connect(button, &QPushButton::clicked, this, &NJointControllerClassesWidgetEntry::createCtrl);
             }
             //descr
             {