* src/find.c: changes to find_parameters/find_file i18n.
* src/widget.c: new function introduced, button_scan_hotkey();
button_new() and button_set_text() fixed to use mentioned function.
* src/key.[ch], src/dlg.c: changes to make recognition of ESC char as
ALT(c) possible for 8-bit chars. (By replacing 'A'/'Z' comparisons with
call to isalpha() in the way proposed by Norbert).
* src/boxes.c: changes to display box i18n
* src/learn.c: changes to learn key dialog i18n
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