[Development] Updated high-DPI support for Qt 5.14

[Thiago Macieira]

On Friday, 13 September 2019 06:43:30 PDT Morten Sørvig wrote:
> * Environment variables for development and testing:
> 
> - QT_SCALE_FACTOR                  : enables devicePixelRatio scaling in
> QtGui, applies a global scale factor. - QT_ENABLE_HIGHDPI_SCALING [new]  :
> enables devicePixelRatio scaling in QtGui; applies per-screen scale factors
> computed from on screen DPI. - QT_FONT_DPI [now x-platform]     : overrides
> the DPI for all screens

What happened to QT_AUTO_SCREEN_SCALE_FACTOR and QT_SCREEN_SCALE_FACTORS?

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel System Software Products