Options: tabs Allgemein / Beute / Tastenbelegung with key bindings

- Options window in three tabs; the auto-pickup settings move to Beute;
  sliders move with their page; black sides like the save game screen.
- Tastenbelegung: every binding settable (click, press key; Esc cancels,
  Backspace unbinds), "Alle zurücksetzen" as a game button, saved on OK.
- Potions bindable (default unbound), named by the game's potion texts; the
  game's own potion hotkeys are off; bar tooltips show the bound key.
- Map (M), overview map (Tab, held) and labels (Alt, held) bindable; the
  game's own M / Tab / Alt handling is switched off.
- Save game key calls the game's save window code instead of a posted key.
- Teleportationstrank: fixed text replacement from startup (also the
  Ausdauertrank items, potion kind 5 as well).

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

docs/todo.md

@@ -118,7 +118,7 @@ in-game texts/tooltips that name the old keys):
 
 | Key | Action | Temporary key (sacred_re.ini) |
 |---|---|---|
-| W | action slot 3 (`cEngine::UseActionSlot`, like Q/E/R/B/Space) | G (`[keys] ActionSlot3`) |
+| W | potion kind 3 (`cEngine::UseActionSlot`, like Q/E/R/B/Space) | game potion keys switched off; `[keys] Potion1-5` (docs/options.md) |
 | A | pick up items nearby (creature event 0x113) | Q (`[keys] PickUp`, 2026-10-17; was V) |
 | S | save game window (`UI_WND_SAVEGAME`) | K (`[keys] SaveGame`) |
 | D | unbound | - |