How to create gtk menu item with shortcut displayed? - c

Question

I am trying to integrate appindicator with gtk menu.
I want some of menu items have shortcuts like here:
Unfortunately after adding accelerator to second menu item I still get item with no icon and no shortcut.
What I expect to see is a shortcut to the right of "item2".
int main (int argc, char **argv) {
gtk_init(&argc, &argv);
// main window
GtkWidget* window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
gtk_window_set_title(GTK_WINDOW(window), "menu-with-shortcuts-window");
gtk_window_set_icon_name(GTK_WINDOW(window), "menu-with-shortcuts-icon");
g_signal_connect(G_OBJECT(window), "destroy", G_CALLBACK(gtk_main_quit), NULL);
gtk_widget_show_all(window);
// indicator
AppIndicator* indicator = app_indicator_new("menu-with-shortcuts-appindicator", "transmission-tray-icon", APP_INDICATOR_CATEGORY_APPLICATION_STATUS);
// menu
GtkWidget* indicator_menu = gtk_menu_new();
GtkWidget* item1 = gtk_menu_item_new_with_label("item1");
gtk_menu_shell_append(GTK_MENU_SHELL(indicator_menu), item1);
g_signal_connect(item1, "activate", G_CALLBACK(Item1Clicked), NULL);
gtk_widget_show(item1);
GtkAccelGroup* accel_group = gtk_accel_group_new();
gtk_window_add_accel_group(GTK_WINDOW(window), accel_group);
GtkWidget* item2 = gtk_image_menu_item_new_from_stock(GTK_STOCK_QUIT, accel_group);
gtk_widget_add_accelerator(item2, "activate", accel_group, GDK_q, GDK_CONTROL_MASK, GTK_ACCEL_VISIBLE);
gtk_menu_shell_append(GTK_MENU_SHELL(indicator_menu), item2);
g_signal_connect(item2, "activate", G_CALLBACK(Item2Clicked), NULL);
gtk_widget_show(item2);
app_indicator_set_status(indicator, APP_INDICATOR_STATUS_ACTIVE);
app_indicator_set_attention_icon(indicator, "menu-with-shortcuts-appindicator");
app_indicator_set_menu(indicator, GTK_MENU(indicator_menu));
gtk_widget_show_all(window);
gtk_main();
return 0;
}