hand wand bug fix
Adding support for tracking the slot of an inventory that items are removed from - bug 271:resolved. This properly allows us to a) restore items to their exact spot if it's currently open, b) allows us to properly rollback furnace insert/removals - bug 331:resolved - and in addition with some code cleanup and related work, we properly track items removed from brewing stands on break - bug 6:resolved - and we can now properly rollback items to brewing stands - bug 375:resolved.