Dark style engine for Windows10 (kvAntum)

[SamiV123]

Hi all

So I ported a port of the Linux kvAntum style engine for Windows10.

You're free to use it if you like, just be aware that it's a bit outdated and the original upstream kvAntum has gone far ahead.

https://github.com/ensisoft/qt5-dark-theme

The SVG styles are built into the .dll style engine itself and it's pretty easy to add new resources and styles.