Add 'Box of Kick-Knacks' as a drop from Gluwax

This is the item required for the quest 'Burglareal'. Since Gluwax doesn't drop it, you only drop 14 during a 4-loot Kickroach dungeon run, and you need 15 for the quest. If this isn't intentional to make you run the dungeon again or encourage you to explore the Vilinsekt Hideout area, it would be nice to be able to finish it in a single run.