Install gnome-icon-theme-gperfection2 by entering the following commands in the terminal:
sudo apt update sudo apt install gnome-icon-theme-gperfection2
Description:
icon theme for GTK+ 2.x
This GTK+ theme provides a scalable group of icons to be used by GTK+ 2.x applications like GNOME 2.
Version: 2.3-0ubuntu4
Section: universe/gnome