Installing gnome-icon-theme-full as suggested by Steffen in duplicate bug #875772 fixed the problem:
https://bugs.launchpad.net/ubuntu/+source/arista/+bug/875772/comments/3
Installing gnome-icon- theme-full as suggested by Steffen in duplicate bug #875772 fixed the problem:
https:/ /bugs.launchpad .net/ubuntu/ +source/ arista/ +bug/875772/ comments/ 3