* set environment variables before starting QApp
* fix-422
* Better support of hidpi
* Fix Typo in App-Name
* Remove fontScaleFactor bits
* Add documenation for hidpi displays
- ROI updates on sigTransformChanged
- ViewBox is more careful about accepting all auto-range changes up to the point it is disabled, even if the auto-range calculation is deferred.
- ConsoleWidget now correctly catches its own exceptions
- Fixed ViewBox auto-scaling bug
- Fixed functions.siEval not parsing units correctly
- Fixed bug caused when opengl GL_VERSION_STR is None