Added Contents tab to Stockpile window, to view items stocked in that stockpile
Added Clean Floor job. Gnomes will attempt to stock items on this tile before stocking other items. If there are multiple items on this tile, gnomes may use a wheelbarrow even if the items are going to different stockpiles.
Items that are offered to a merchant, but no longer exist, potentially not being removed as an offer if items of higher quality exist. This was sometimes leading to a crash when trading later.
Crash when loading saves from 0.8.47 directly into 0.8.49