ore sorter reject on overflow option

Add an option to make the ore sorter reject trucs, when the ore sorter is full of a product that the truck is trying to unload. Then the mine for that product would stop working (which is ok becausethere is enugh of that product), but the other resources would not get stuck. This would remove micromanaging the mines. If I have enugh coal then only the coal mine should stop, instead of making the sorter get stuck, such that I runn out of iron

Just have separate sorters for coal and iron ore, you usually do not have those close by anyway (especially if you mine out starting locations).