Dark mode - Black interface color

[Volker Dirr]

Since the user am suggested it in the guestbook: (Please do suggestions only in the forum)

If you want to use a dark mode. So if you want to change the interface color to black (or any other color of your OS color) please have look at this videos:

Windows:
https://www.youtube.com/watch?v=QzEmMD-NVIc

Linux:
https://www.youtube.com/watch?v=zbzcb-4-e6w

MacOS:
https://www.youtube.com/watch?v=V_KYhc4BtGM