[BUG] sys.dark not returning true after upgrade to 1.9.15

[Winter]

Setting dark = true in the imports/theme.nss brings the dark theme back.

theme
{
	name = "modern"
	dark = true
	background
	{
		color = default
		opacity = sys.is11 ? default : 90
		effect = default
	}
	image.align = 2
}

Version: 1.9.15 Windows Version: 10.0.22631 (Windows 11 Pro) Windows Theme: Windows (dark)

[moudey]

#418