[Development] Revisiting high-DPI configuration options

[Prav]

Hello, Everyone and Thiago.

>> SVG icons are not shown at all in static builds of Qt, but png icons are
>> fine (both icons are taken from resorse file). Static and shred Qt 5.6.1
>> build were done with same config settings except of cause "static".

> Remember to force the inclusion of the svg icon plugin into your application.

This seems a valuable advise which worked for me. I finally found how to do this, In pro-file add:
QTPLUGIN *= qsvg


Without this svg icons just do not render SILENTLY (in "static").