Request: Save/Restore Labor Assignments

[doktorstick]

Howdy. A common pattern for me is to assign all idle dwarves to large tasks, such as building walls, gathering, hauling, etc., even though they have their own specializations or other, better-suited tasks. It would be nice to be able to snapshot the current labor assignments, tell my dwarves to do specific (non-specialized tasks), and then later revert their labor assignments to my checkpoint. A bonus would be to allow multiple labor checkpoints to be saved.