Ditto.

Ditto.
(xmenu_show) [LESSTIF_VERSION]: Add workaround for remaining
button grab under LessTif
(HAVE_BOXES): Define if USE_X_TOOLKIT.
(HAVE_BOXES): Define if using Lucid menus.
(single_submenu): Set button_type of menu to
BUTTON_TYPE_NONE.
(single_submenu): Likewise for panes and menu items.
(set_frame_menubar): Set button_type of menu bar to none.
(xmenu_show): Likewise.
(single_submenu): Set widget values selected slot.
(xmenu_show): Likewise.
(push_menu_item): Add parameters `type' and
`selected'. Store it in menu_items.
(MENU_ITEMS_ITEM_TYPE): New.
(MENU_ITEMS_ITEM_SELECTED): New.
(MENU_ITEMS_ITEM_LENGTH): Increase by two.
(popup_get_selection): Use xmalloc/xfree instead of
malloc/free.