Gui: move to new style connect()

src/Gui/ManualAlignment.cpp

@@ -820,7 +820,7 @@ void ManualAlignment::startAlignment(Base::Type mousemodel)
         : tr("Please, select at least %1 points in the left and the right view").arg(n);
     myViewer->myLabel->setText(msg);
 
-    connect(myViewer, SIGNAL(destroyed()), this, SLOT(reset()));
+    connect(myViewer, &QObject::destroyed, this, &ManualAlignment::reset);
 
     // show all aligned views in the 2nd view
     myFixedGroup.addToViewer(myViewer->getViewer(1));