Baganator Gamepad

Rewritten so it no longer hands Baganator's windows to Blizzard's gamepad manager, which tainted the gamepad UI (blocked actions and broken target-marker modifiers until /reload). The addon now drives its own navigation while a Baganator bag or bank window is open: D-pad moves between items, A picks up/places, X uses/equips or sells at a merchant, B drops the held item or closes, LT/RT switch between bags and bank. Controls go back to Blizzard during combat and when the window closes. Guild bank is no longer covered.