Fix fullscreen monitor selection doesn't work on Windows

Related to #1390

src/dialogs/kdenlivesettingsdialog.cpp

@@ -743,8 +743,16 @@ void KdenliveSettingsDialog::initDevices()
     QSignalBlocker bk(m_configSdl.fullscreen_monitor);
     m_configSdl.fullscreen_monitor->clear();
     m_configSdl.fullscreen_monitor->addItem(i18n("auto"));
+    int ix = 0;
     for (const QScreen* screen : qApp->screens()) {
+#ifdef Q_OS_WIN
+        // Screen manufacturer, model and serial don't work under Windows
+        m_configSdl.fullscreen_monitor->addItem(QString("%1: %2").arg(QString::number(ix), screen->name()), QString::number(ix));
+        ix++;
+#else
         m_configSdl.fullscreen_monitor->addItem(QString("%1 %2 (%3)").arg(screen->manufacturer(), screen->model(), screen->name()), screen->serialNumber());
+#endif
+
     }
     if (!KdenliveSettings::fullscreen_monitor().isEmpty()) {
         int ix = m_configSdl.fullscreen_monitor->findData(KdenliveSettings::fullscreen_monitor());

src/monitor/monitor.cpp

@@ -989,9 +989,15 @@ void Monitor::slotSwitchFullScreen(bool minimizeOnly)
         // Move monitor widget to the second screen (one screen for Kdenlive, the other one for the Monitor widget)
         if (qApp->screens().count() > 1) {
             bool screenFound = false;
+            int ix = -1;
             if (!KdenliveSettings::fullscreen_monitor().isEmpty()) {
                 for (const QScreen* screen : qApp->screens()) {
+#ifdef Q_OS_WIN
+                    ix++;
+                    if (QString::number(ix) == KdenliveSettings::fullscreen_monitor()) {
+#else
                     if (screen->serialNumber() == KdenliveSettings::fullscreen_monitor()) {
+#endif
                         // Match
                         m_glWidget->setParent(nullptr);
                         m_glWidget->move(screen->geometry().topLeft());