spelling: separate the fixing of different words with a short pause

When fixing a misspelling and not answering 'All' (but 'Yes' or 'No'),
the chance is quite substantial that one will type y or n at the end of
the next word.  Diminish this chance by showing for a moment a message
on the statusbar.

src/text.c

@@ -2450,6 +2450,10 @@ bool do_int_spell_fix(const char *word)
 	    openfile->mark_set = old_mark_set;
 #endif
 	    do_replace_loop(TRUE, current_save, &current_x_save, word);
+
+	    /* TRANSLATORS: Shown after fixing misspellings in one word. */
+	    statusbar("Next word...");
+	    napms(400);
 	}
     }