Rounded player/resource boxes for Le Havre

Redesigned resource/player boxes for [Elliotsfar's](https://www.thingiverse.com/elliotsfar) excellent [Le Havre insert](https://www.thingiverse.com/thing:3537061).

My version includes rounded corners and a beveled edge inside to make scooping the resources out a bit easier.

(The token organizer pictured (in natural PETG) has not been redesigned as part of this remix and is not included in the Thing files.