Enhanced Mixer Wagons

This script adds an mixing time for all mixer wagons.
With this script, each mixer wagon now needs 2 minutes and 10 seconds to mix the total mixed ration, as soon as the mixing ratio is correct.
Of course, it has to be turned on to do this. If the mixing time is running and you fill it during this time, the mixing time will be reset to the beginning.
As long as the mixing ratio is wrong or the mixing time has not run to the end, you have forage in the mixer wagon. You can also feed this, but it less effective than the total mixed ration.
It also the mixer wagon has to be turned on now so that the bales dissolve.
This mod is compatible with the maize plus mod, this has been tested extensively.
If you play with the maize plus mod, the unfinished total mixed ration is accepted as moisture food in the stable feeding trough. If you play without the maize plus mod, it will be accepted as grass.