message: Fix potential overhead issue recommended by IDE warning
  No need to create a copy -- may be optimized in release mode but this avoids the need for a copy at all.
diff: @@ -192,7 +192,7 @@ void MineOperationsWindow::update()
  const auto origin = mRect.startPoint();
  renderer.drawImage(mUiIcon, origin + NAS2D::Vector{ 10, 30 });
  - const auto mineYield = MINE_YIELD_TRANSLATION.at(mFacility->mine()->productionRate());
  + const auto& mineYield = MINE_YIELD_TRANSLATION.at(mFacility->mine()->productionRate());
  drawLabelAndValue(origin + NAS2D::Vector{ 148, 30 }, "Mine Yield: ", mineYield);
  const std::string statusString =
  