[Feature Request] Double borders

[yellingintothevoid]

Hey there,
thanks for making all of these great programs and being so cool about feature request and bugfixes! Would it be possible to get double borders where the colours and sizes are adjustable independently from one another? I'd love to get something like this or this on macOS!

[FelixKratz]

I think that should be doable, maybe as a new special color.

[FelixKratz]

The drawing function is now refactored so it should be a bit easier for someone to add this.

I think I will not implement this myself, as it is not something I myself would use and it is a nice feature for someone to pick up, so feel free to send a PR.

The special color could be something like:

double(0xAARRGGBB,0xAARRGGBB)