Mod MAGSI Wheelloader shovel 1000000 L for Farming Simulator 2019

Just a slightly modified version of the built-in WheelLoader shovel.

- Fixed store image.
- Shovel configurable (3000, 6000, 9000, 12000 and 1000000 - liters)
- Added color selection

changed parameters:
price: 10000 EUR (Original: 3600 EUR)
fill volume: 1000000 Liter (Original: 3000 Liter)
unloading speed 10000 (Original: 1900)