I try to set icons for programs and context menus by dconf under org>gnome>desktop>interface>menus-have-icons but didn't work, help!
(in Freya I think I got this using Ubuntu-Tweak)
Full explanation here.
What concern us: setting this via
org.gnome.desktop.interface does not work because
buttons-have-icons) is deprecated, but it's still possible to set this parameter by adding:
, 'Gtk/MenuImages': <1> to "overrides" key in
org.gnome.settings-daemon.plugins.xsettings (with a comma and a space before, because in eOS this key is not empty)