Adwaita: Use transparent black for window border in dark too
Avoid smear when the background behind the window is dark. Adjust opacity to make it appear roughly the same as before on white background.
See !3260 (merged)
CC @jimmac
Avoid smear when the background behind the window is dark. Adjust opacity to make it appear roughly the same as before on white background.
See !3260 (merged)
CC @jimmac