Aquarist DLC Hotfix 2

DLC Changelog: -Removed a bug that reaching level 4 was very, very difficult (we are very sorry about that) -Fixed that you can keep different types of piranhas in one aquarium -Fixed a bug where you could accidentally sell large aquariums unlocked at level 4 -Added the ability to throw boxes with items in the same way as garbage -Items sold while a day has passed and there was no player in the store location are correctly included in the achievements count -It is no longer possible to place decorations on a loose background, which resulted in the item being bugged