It happens because Gnome depreciated & removed gtk-icon-sizes settings from gtk-3.10.
On Tue, Jul 22, 2014 at 5:34 PM, Jagadish <krshnam gmail com> wrote:
Hi,Earlier, the size of the icons in the gnome-panel menu could be set by using a line of the form,gtk-icon-sizes = panel-menu-bar=16,16:panel-menu=16,16:panel=16,16:gtk-large-toolbar=16,16:gtk-small-toolbar=16,16:gtk-button=16,16
in the "settings.ini" file under ~/.config/gtk-3.0/.This does not seem to work any more for the gnome-panel in the gnome-flashback( metacity ) session in Ubuntu 14.04.Can someone please suggest an alternate solution that will work in Ubuntu 14.04 to set the icon size and separation between menu items in the gnome-panel menu?Commit: (https://git.gnome.org/browse/gtk+/commit/?h=gtk-3-10&id=e779e04bc25e701d05aed6f532eac1b2cd384912)Unfortunetely there is no such alternate solution unless you compiled GTK+ with the patch to get it back.
Oryou can file a bug at GTK+. (for Ubuntu there is already one: https://bugs.launchpad.net/ubuntu/+bug/1285683)AFAIK, Alberts restored those option as Gsettings in future branch of Gnome-panel(3.10).So we may get it back in 3.10.
Thanks.
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