Is your feature request related to a problem? Please describe.
Not so much a "problem" but rather "Missing".
"bar"-groups have border options such as: Border color, Icon border width, Padding, etc
Icon-group's don't have these, while for certain Icon's I would like to have a border (-color and/or -thickness) to make them better visible as some icons tend to blend with the world, because the colors of the icon, having a border around them can make then stand out better, without having to make them big to notice them.

Describe the solution you'd like
I would like to see the same border options Bar groups have for the Icon groups.

Describe alternatives you've considered
I've tried to use the bar groups, but it doesn't look right when all you need is an icon.