Upload your custom svg to public/assets/
.
Then go into the admin area for custom css/less and add the following:
.icon.custom-icon {
display: inline-block;
background: url(/assets/logo-symbol.svg) center;
width: 100%;
height: 100%;
background-size: 100%;
}
And then in the group modal use the icon icon custom-icon
. Change names to whatever you need.
Feel free to use better naming for the .custom-icon
class and the filename of the svg.