[Development] QUIP 8: High-DPI Support

[Morten Sørvig]

Hi all,

A draft of QUIP 8: High-DPI Support is now available:

	https://codereview.qt-project.org/#/c/194524

Comments are welcome! Either here or on codereview.

The plan is to write this up in there parts:

1) High-DPI terms and overview of other platforms
2) High-DPI support rationale for Qt
3) Documentation for the devicePixelRatio implementation

The first part is available as a draft now and is intended to be a fairly
neutral overview. Following parts will have increasing opinionatedness towards
a specific approach and implementation.

Morten