(init_menu_items): Disable code.

(init_menu_items): Disable code.
(x_activate_menubar): New function.
(initialize_frame_menubar): Pass in new param to set_frame_menubar.

(get_frame_menubar_event): Check for the possibility
of a menu-bar button.  A menu-bar button is a caption on the menu
bar with no submenu.

(set_frame_menubar): Correctly handle menu-bar buttons.
(add_menu_item): Equiv parameter send and paid attention to.
(keymap_panes, list_of_panes): Use CreatePopupMenu.
(single_keymap_panes): Use CreatePopupMenu.  Send key descriptions
to add_menu_item.
(list_of_items): Use CreatePopupMenu.  Send nil description to
add_menu_item.
(get_menu_event): Send keymap instead of menu to get_keymap_event.
(Fx_popup_menu): Extra parameter to mouse_position_hook.  Don't
send address of menu to win32menu_show.
(win32menu_show): Send message to call popup menu rather than
trying directly.  get_menu_event should take an address.
Call eat_mouse_events in order to get rid of any extraneous
mouse events.
(list_of_panes): Only bring up one pane if the length of the list
of panes is one.

(single_keymap_panes): Fixed problem with 'descrip'
lisp object not being protected properly (GCPRO).
(get_single_keymap_event): Fixed problem with 'descrip' lisp
object not being protected properly (GCPRO).
(name_is_separator): New function.
(list_of_panes): If a pane's name is empty ("") items are now
placed in the main popup instead of a blank-named submenu.  This
seems to be an undocumented feature of x-popup-menu.
(list_of_items): New argument HMENU.
Use 1 and 0 instead of Qt and Qnil for enable in add_menu_item