update v18.2

"Discord Suggestions" is a short series that will feature random prompts
from the #suggestions channel on our Discord Server.

The aim of this series is to chop down the long suggestion list, without
having to wait a specific theme. 

Each batch will last 5-10 updates and is planned on a bi-monthly basis (~)

-

- Added 9 more props to add on top of the junk piles
- Added a bunch of scrap metal and junk cubes + stacked version
- Updated the theme files with the new stuff

See you and happy game-making! :)