Translate hardest room at display time instead of at time of death

The hardest room used to be stored as a room name in whatever language
it was in when you last died enough times to break the record (before
localization, that was always English). Even after localization became
a thing we could get away with this since we only had a single font,
but now we might have actual question marks appearing when the new font
doesn't support characters from the old language.

Therefore, this commit adds more info about the hardest room to save
files - everything that is needed to know in order to do the
translation at display time. These are hardestroom_x and hardestroom_y
for the room coordinates, as well as hardestroom_specialname to mark
special names, in addition to changing the stored room name back to
English. I've also added hardestroom_finalstretch in case we later
decide to drop the English name as a key and rely on just the
coordinates (even though I think that change itself would be more
complicated than any simplification it would accomplish, and I don't
think it's necessary, but better to have it if we do need it later)

desktop_version/src/Script.cpp

@@ -3187,8 +3187,12 @@ void scriptclass::hardreset(void)
     game.translator_cutscene_test = false;
 
     game.totalflips = 0;
-    game.hardestroom = loc::gettext_roomname(false, 13, 5, "Welcome Aboard", false);
+    game.hardestroom = "Welcome Aboard";
     game.hardestroomdeaths = 0;
+    game.hardestroom_x = 13;
+    game.hardestroom_y = 5;
+    game.hardestroom_specialname = false;
+    game.hardestroom_finalstretch = false;
     game.currentroomdeaths=0;
 
     game.swnmode = false;