
The styling introduced in commit 8fed0b83d
was only intended
for symbolics, it looks weird when applied to full-color icons.
So instead of using the GIcon type, apply the special styling
based on the new StIcon:is-symbolic property.
Closes: https://gitlab.gnome.org/GNOME/gnome-shell/-/issues/7620
Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/3296>