Border of groupboxes

[knoniewicz]

GroupBoxes are 2 colored (white and dark gray) in w98, however the css has them colored in 4 colors (black, d gray, b gray, white)
example in windows 98:

css:

[jdan]

Great catch!

[nemo369]

I made a PR for this one
#95

[jdan]

Fixed via #95 (thanks @nemo369 ✨)