(command_loop_1): Set FRAME_MENU_BAR_ITEMS here.
(menu_bar_items): Reverse the list when done.
(command_loop_1): Typo calling Qrecompute_lucid_menubar.
(read_key_sequence): Likewise. Also fix call to Vrun_hooks.
(kbd_buffer_get_event): Handle selection_clear_event
and selection_request_event events.
(read_key_sequence): Support Vcurrent_menubar
and Qactivate_menubar_hook. Call Qrecompute_lucid_menubar.
(syms_of_keyboard): Set up Vcurrent_menubar, Vprevious_lucid_menubar,
Qactivate_menubar_hook, and Qrecompute_lucid_menubar.