https://mail.gnome.org/archives/gtk-devel-list/2006-March/msg00090.html
Possible bug in gtkcellrenderertext - gtkeditable interaction.
possible buginteraction
https://mail.gnome.org/archives/glade-devel-list/2006-July/msg00007.html
[Glade-devel] GtkEditable signals
gladedevelsignals