This icons are from GNOME Desktop Tango icons. Contains only the needed icons by mycms. 
https://commons.wikimedia.org/wiki/GNOME_Desktop_icons

All icons can be downloaded from: 
https://ftp.gnome.org/pub/GNOME/sources/gnome-icon-theme/2.20/gnome-icon-theme-2.20.0.tar.gz

If you need more icons, look at https://commons.wikimedia.org/wiki/GNOME_Desktop_icons 
to figure out the name of the icon that you want and then 
find the icon from the zip.

