Windows dark mode

[Et0h]

No description provided.

[Et0h]

@sxiii @CalMaciborka @Zefferis @0lhi

Please test using dark mode support for Windows:

• Portable: https://github.com/Syncplay/syncplay/suites/4345878929/artifacts/114004663 or
• Installer: https://github.com/Syncplay/syncplay/suites/4345878929/artifacts/114004664

Light/dark mode should follow your system settings for Windows 10 Anniversary users and above.

Thanks to @albertosottile for his work on the dark mode detector which we use for this feature.

[Et0h]

See #480 for a discussion on the title bar.

[TeamDman]

Looks great to me!
Only comment is that the titlebar changes to white when unfocused, not sure if there's an easy solution to that which doesn't involve custom window controls like discord/spotify.

The closest maybe-non-custom thing I can think of would be the new Outlook's dark mode

[Et0h]

@TeamDman This seems to relate to how Windows behaves rather than being a Syncplay-specific issue.

I just looked it up and following the advice at https://www.reddit.com/r/Windows10/comments/93e2yp/black_accent_color_in_windows_10/ worked for me. However, the advice is a bit old so I had to tweak what I did a bit: I had to set the 'Windows colours' under 'Colours' to a dark grey and also enable 'Title bars and window borders' under 'Show the accent colour on the following surfaces'. As usual, if you mess with your registry then you do so at your own risk.