Most seems to work. Multi threading is not optimal

however some points use a timeout with select or wait_for
to poll a condition at the same time.

pglab/MainWindow.cpp

@@ -131,6 +131,9 @@ void MainWindow::on_actionAbout_triggered()
 			  "\n"
 			  "Icons by fatcow http://www.fatcow.com/free-icons provided under Creative Commons "
 			  "attribution 3.0 license\n"
+              "\n"
+              "More icons by https://icons8.com/ under Creative Commons Attribution-NoDerivs 3.0 Unported "
+              "license."
 			  ));
 
 }