Quck Fix and Improvement

v2021.06.04C:

• Fixed Rabbit run over (hopefully)
• Fixed coolants and engines sometimes being too heavy (hopefully)
• As a "side effect" now every part on the car affects it's weight
  So from now on the car will really be lighter without bumpers, doors, you...
• The moped's balance got much better, so it is more usable now
• Attaching and removing license plates got a lot more easier
• The moped's basket is now attachable to anywhere (with G)
  and the items you store in it won't fall out, like with the truck's fuel can holder
  (it only works if the item is not falling out as soon as you release it, it has to stay there a litte bit, and then the physics is removed)
• Same with the gloveboxes in every vehicle
• You can now coil up the siphon hose a bit (by holding R) so it is easier to put it in the glovebox
  (it is enough if only a bit of it is inside)
• And you can drain fluids with it from containers/tanks, without an other can (by holding LMB)
• The sink's hole is now actually a hole
  (it has no collider there)
• Small script optimizations and even smaller model optimizations
• Fixed "Saved!" text not using translations
• Fixed possible saving issues with truck and some small other things