* 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
* Fix pg not defined
* 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
Although the documentation used to say that specifying tipAngle would
override headWidth, headWidth was never used. The new behaviour is that
tipAngle will be used, with a default value of 25, unless headWidth is
specified.
Co-authored-by: Ogi Moore <ognyan.moore@gmail.com>