Have Carts also operate as stockbins when empty

As the title says, on top of the current function of carts acting as an upgraded sled, also have it work as a portable stockbin. If the stockbin function of the cart is empty, allow it to operate as it already does. If the cart is empty of all movable items, allow it to operate as a stockbin. This would have ramifications in allowing transport of large quantities of drywood from timber piles, brick manufactured at clay deposits, chipped lime from lime deposits, etc etc.
If the cart is operating as a stockbin, ie, items are in it, a graphical update would be cool, as stockbins already do, to show which type of item is currently in it.
In my opinion, this would make large construction operations and off-claim harvesting interesting and much more manageable. My current brick operation looks like an ancient burial crypt with 30+ urns waiting to be filled with bricks and hauled off.
I could also see a sled operating in the same fashion, but only able to hold a fraction of what a cart is capable of.
Thanks for the consideration! Hopefully this isn't too much to ask for
If the cart is operating as a stockbin, ie, items are in it, a graphical update would be cool, as stockbins already do, to show which type of item is currently in it.
In my opinion, this would make large construction operations and off-claim harvesting interesting and much more manageable. My current brick operation looks like an ancient burial crypt with 30+ urns waiting to be filled with bricks and hauled off.
I could also see a sled operating in the same fashion, but only able to hold a fraction of what a cart is capable of.
Thanks for the consideration! Hopefully this isn't too much to ask for
