message: Prefer floor rounding for Qt 5.14+ fractional DPI handling
  * Non-integer DPI handling is fundamentally a broken concept, because UIs are
  essentially pixel art with some vector drawing. Rounding down half fractions
  seems to be a better tradeoff than rounding up or trying to render them as-is.
diff: @@ -94,6 +94,11 @@ int main(int argc, char *argv[])
  QGuiApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
  QGuiApplication::setAttribute(Qt::AA_UseHighDpiPixmaps);
  +#if(QT_VERSION >= QT_VERSION_CHECK(5, 14, 0))
  + QGuiApplication::setHighDpiScaleFactorRoundingPolicy(
  + Qt::HighDpiScaleFactorRoundingPolicy::RoundPreferFloor);
  +#endif
  +
  QApplication::setApplicationVersion(lit(FULL_VERSION_STRING));
  // shortcut here so we can run this with a non-GUI application
  