bug#57522: 29.0.50; Fix submenu indicator on X11 no toolkit

[Eli Zaretskii]

> From: Po Lu <luangruo@yahoo.com>
> Cc: manuel@ledu-giraud.fr,  57522@debbugs.gnu.org
> Date: Fri, 02 Sep 2022 16:25:01 +0800
> 
> Eli Zaretskii <eliz@gnu.org> writes:
> 
> > How is this different from what happens with menus on TTY frames?
> 
> TTY menus don't open submenus on the sides?

What do you mean by "on the sides"?

AFAIK, all the implementations of menus that use the "not
USE_X_TOOLKIT && not USE_GTK" version of x_menu_show from xmenu.c
behave the same wrt locating sub-menus.  And if you are asking about
alignment of sub-menus with their parent menu item, then no, there's
no alignment.  Never was.