[TF2] Fix ConTracker animation exploit
 

This prevents the recently discovered ConTracker animation exploit while still allowing players to equip and open their ConTrackers.



The exploit works by preventing TF2 from ever resetting the sequence ACT_MP_CYOA_PDA_IDLE, due to the item being removed from the player's loadout.

The simple fix is to prevent this animation from ever playing in the first place by blocking the cyoa_pda_open command. The more complicated fix would be to reset the sequence ourselves, but that requires gamedata and probably isn't worth it.