Cargo train update

- Adds sprites (thanks to Bishop)
- Adds order-able train cargo crates
Cargo trains

- Adds a cargo train to cargo at round start
Cargo train fixes

- Visual tweak for mobs on trolleys
- Fixed a teleportation bug when boarding trains from other trains
- Fixed a runtime involving on_click code
Merge pull request #5753 from Loganbacca/trainmerge

Cargo Trains