message: wrap HiDPI in an ifdef check for Qt >=5.6
diff: @@ -107,7 +107,10 @@ int main(int argc, char *argv[])
  QTextCodec::setCodecForCStrings(QTextCodec::codecForTr());
  #endif
  +#if QT_VERSION >= QT_VERSION_CHECK(5, 6, 0)
  QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
  +#endif
  +
  QApplication app(argc, argv);
  // Do this early as we don't want to bother initializing if we are just calling IPC
  