* configure.in: ALL_LINGUAS test added, to allow specify list
of languages to be installed by setting env variable before
configure. If it is empty, it defaults to full list.
* src/menu.h menu_entry.{hot_pos, is_dupped} dropped
* src/menu.c: consistency fixes: pull-down menu items are now
accessible either with arrow keys or with hotkeys, denoted with &
(and highlighted). (key combinations, placed to the right of items
intended to be used from outside the menus). Freeing menu entries
removed as it no longer needed
* src/main.c, edit/editmenu.c: menubar init code is changed to conform
above fixes.
* edit/edit.h: use of "Cancel" in error_dialogs replaced with
"Dismiss", to avoid collisions in translation of "Cancel" in other
places with this case.
* src/boxes.c: select_format() and it's support removed, as it is
obsoleted by input line history feature. display_init()/display_callback
fixed to suite i18n changes. sort_box() - alike.
* src/option.c: pause_options added &'s and gettext calls to expand
statically assigned values.
* src/widget.c: (radio_callback) hotkey recognition is changed to
&-notation, rather than simple uppercase.
* src/dlg.c: (dlg_try_hotkey) plain symbol comparison replaced with
call to isalpha(), this fixes errorneous exit from input line, when
button hotkey is 8-bit NLS char.
