DRAKHYSYS INFINITY WORKBENCH V4.8.8.43

UI INTERFACE / NEW GAME FLOW EDITOR

Added reversible stock BG2 START-menu campaign controls:
- Show / hide Shadows of Amn
- Show / hide Throne of Bhaal
- Show / hide Black Pits II
- HIDE ALL STOCK CAMPAIGNS
- RESTORE ALL STOCK CAMPAIGNS

When hidden, the stock book/icon control and its click behavior are removed from the exported START menu.
The exact original controls are stored in a managed encoded comment inside UI.MENU so they can be restored later even if the already-exported UI.MENU is used as the next base file.

Also added custom-button destination types:
- Start stock Shadows of Amn
- Start stock Throne of Bhaal
- Start stock Black Pits II

This lets a custom Drakhysys menu hide the three original campaign books while optionally exposing any stock campaign again through a custom button.
