Extended Sugar Beet and Potato Harvesters

With this script, sugar beet and potato harvesters can now harvest additional root crops. The following root crops can be harvested by sugar beet harvesters in addition to sugar beets and red beets: potatoes, carrots, and parsnips. Potato harvesters can now also harvest sugar beets, red beets, carrots, and parsnips in addition to potatoes. These root crops can also be overloaded by the Bergmann RRW 500 and the Ropa Maus 5. No mod vehicles need to be modified! Compatible with all common vehicles, as long as they are not in their own store category and are built according to the GIANTS standard. Thanks to Ifko[nator].