Add Bank support

[Bombo]

Restacker should also work with a player's personal bank. These feature should include:

Filling up incomplete stacks in bank.
Optionally creating new stacks of items, which already have full stacks in bank (maybe with blacklist).
Keep items in inventory and withdraw items which are needed for writs.

[Bombo]

Added restacking option for player bank for the 0.7 milestone.
Note: This only means correcting fragmentations in the player bank, not moving items from inventory to bank.