update v17.7

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

The aim of this serie 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 the vertical version of the container (2 colours)
- Added some bricks and stacked bricks
- Added a barrel (2 versions, 2 colours)
- Added a stairless version of the Water Tower
- Updated the theme files with the new stuff

See you and happy game-making! :)