Adirelle:
	- Bag slot: fixed bag updating.
	- Added a timeout when emptying a bag, so lag or a missing event doesn't lock the inventory forever.
	- Bag slots: use our own implementation that is far easier to manage.
	- Added a way to lock all item buttons, so nothing to bad happens when we automatically move items around (tidy or empty bag).
	- Fixed the bag emptying process.
	- Bag slots: one can right click on a bag to try to empty it.
	- Bag slots: display the number of items in each bag.
	- Small README update.
	- Set filter: postpone set scanning until we need it.
	- New items: track changes in stack sizes, not only the number of stacks.
