Newmodel vehicle door & panel states are lost

[Fernando-A-Rocha]

Newmodel vehicles mainly lose the following states when the model is changed (happens intentionally clientside with setElementModel & also automatically with engineFreeModel):

• door states
• panel states

This is particularly bad because these are related to visual damage, so it's like they always get repaired.

[Fernando-A-Rocha]

Above commit adds test command to reproduce: (HERE)

/start newmodels /start unittest_newmodels /maketestveh

[Fernando-A-Rocha]

After several attempts, a workaround fix doesn't seem possible for this. The issue seems to be within MTA related to sync of door & panel states that gets messed up after model change