bug#50067: Context menus

[Juri Linkov]

Currently the option context-menu-global of context-menu-functions
doesn't take into account the variable menu-bar-final-items
to properly order the menu items.  This patch makes it possible
to order the items of global-map instead of menu-bar-current-active-maps
used in menu-bar-keymap by default:

diff --git a/lisp/menu-bar.el b/lisp/menu-bar.el
index 980ba2fcd1..b6cc29720d 100644
--- a/lisp/menu-bar.el
+++ b/lisp/menu-bar.el
@@ -2713,9 +2713,11 @@ menu-bar-open-mouse
                        (cdr menu-bar-item-cons)
                      0))))
 
-(defun menu-bar-keymap ()
+(defun menu-bar-keymap (&optional keymap)
   "Return the current menu-bar keymap.
-
+It's possible to use the KEYMAP argument to override the default keymap
+that is the currently active maps.  For example, the argument KEYMAP
+could provide `global-map' where items are limited to the global map only.
 The ordering of the return value respects `menu-bar-final-items'."
   (let ((menu-bar '())
         (menu-end '()))
@@ -2729,7 +2731,7 @@ menu-bar-keymap
              ;; sorting.
              (push (cons pos menu-item) menu-end)
            (push menu-item menu-bar))))
-     (lookup-key (menu-bar-current-active-maps) [menu-bar]))
+     (lookup-key (or keymap (menu-bar-current-active-maps)) [menu-bar]))
     `(keymap ,@(nreverse menu-bar)
              ,@(mapcar #'cdr (sort menu-end
                                    (lambda (a b)
diff --git a/lisp/mouse.el b/lisp/mouse.el
index 3e00ca7ce1..6c97cc365f 100644
--- a/lisp/mouse.el
+++ b/lisp/mouse.el
@@ -364,7 +364,7 @@ context-menu-global
                 (when (consp binding)
                   (define-key-after menu (vector key)
                     (copy-sequence binding))))
-              (lookup-key global-map [menu-bar]))
+              (menu-bar-keymap global-map))
   menu)
 
 (defun context-menu-local (menu _click)