HiDPI save screenshot issues
When saving screenshots on HiDPI display, DPI used for fonts in the saved image is incorrect. It probably should be downscaled by the devicePixelRatio even when "Save fonts proportionally" is chosen. This is needed since when saving WxH image, we are not scaling W & H by the devicePixelRatio. Hence we must not scale DPI as well.
potentially related to #18548 (closed)