Work around a bug in Qt which causes high pings for Wifi connections

See issue #1209.

src/Application.cpp

@@ -67,6 +67,9 @@ Application::Application(int& argc, char** argv) :
     QApplication::addLibraryPath(QApplication::applicationDirPath() + "/plugins");
 #endif
 
+    // Work around a bug in QNetworkAccessManager which sporadically causes high pings for Wifi connections
+    // See https://bugreports.qt.io/browse/QTBUG-40332
+    qputenv("QT_BEARER_POLL_TIMEOUT", QByteArray::number(INT_MAX));
 
     // Parse command line
     QString fileToOpen;