Merge pull request #1399 from srcejon/fix_1312_win_title_bar

Remove ? in Windows title bars

app/main.cpp

@@ -44,6 +44,9 @@ static int runQtApplication(int argc, char* argv[], qtwebapp::LoggerWithFile *lo
     QCoreApplication::setAttribute(Qt::AA_UseHighDpiPixmaps); //HiDPI pixmaps
     QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts); // Needed for WebGL in QWebEngineView and MainWindow::openGLVersion
 #endif
+#if QT_VERSION >= QT_VERSION_CHECK(5, 10, 0)
+    QApplication::setAttribute(Qt::AA_DisableWindowContextHelpButton);
+#endif
 
 	QApplication a(argc, argv);