Fix#2 for Trailers and Cargo Pack by Jazzycat v6.8 for patch 1.31 beta

Temporary fix #2 for Trailers and Cargo Pack by Jazzycat v6.8 for patch 1.31.x beta.

Fix #1 - added cables simulation for all trailers in pack.
Fix #2 - fixed bug with steerable axles for some trailers.

Replace old fix in mod folder.
For ETS2 version 1.31.x beta only!