G_CALLBACK(modest_ui_actions_on_item_not_found), self);
// g_signal_connect (G_OBJECT(self->header_view), "button-press-event",
// G_CALLBACK (on_header_view_button_press_event), self);
G_CALLBACK(modest_ui_actions_on_item_not_found), self);
// g_signal_connect (G_OBJECT(self->header_view), "button-press-event",
// G_CALLBACK (on_header_view_button_press_event), self);