Close button in GtkNotebook

[Augusto Fraga Giachero <augustofg96 gmail com>]

Hi,

I've been playing with Glade and GtkNotebook for while, and I couldn't
figure a way to enable the close button on the tabs like this:


With I've read online it seems that I need to add a GtkBox to the tab
title area and add the label and a standard GtkButton to the right, but
the GtkButton is too large (even with no text inside it) and I couldn't
find out how to use the stock close icon for the GtkButton through
Glade.

Ideas?

Thanks,
Augusto Fraga Giachero.