Fix some #saveoptions issues

The #name default key was 'N', but that gets bound to #runsoutheast
when not using number_pad. Swap around the default #name key to M-n,
and bind the 'N' to it in commands_init instead.

The number_pad option wasn't getting saved because it has a separate
handler - mark the option as changed even if the value did not change
so it will be saved to the config.

src/options.c

@@ -8003,6 +8003,8 @@ doset_simple(void)
                     reslt = (*allopt[k].optfn)(allopt[k].idx, do_handler,
                                                FALSE, empty_optstr,
                                                empty_optstr);
+                    if (reslt == optn_ok)
+                        got_from_config[k] = TRUE;
                 } else {
                     char abuf[BUFSZ];