Herbicide Mixing v1.0.0.0

This mod allows you to mix herbicide and fertilizer. Put one ingredient in the sprayer itself and the other in an additional sprayer tank. Both will now be used at once. When hiring a worker, it is best to put the fertilizer in the sprayer and the herbicide in the additional tank. When mixing is active, there will be a "Mixing" notification text next to the working width.