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UI
Smooth
Snowish
Gnome, session
SteelBlue
128x128
Ultimate Gnome
logout, session, Log in
Black
256x256
session, Hibernate
suspend, session
switch, session
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Pixel
Lynx Black
Halt, session
22x22
session, Reboot
session, suspend
session, switch
Tango
system, session, preferences
32x32