[IMP] When preparing pack operations, use the smallest UoM of the moves if they are...

[IMP] When preparing pack operations, use the smallest UoM of the moves if they are smaller than the default UoM. Otherwise use default UoM.

The same is done when extra moves are generated.  It is going to check if the UoM of the operation is smaller if it has one.

Throw an error when a key can not be found in action_done because there were links on a move
that was not supposed to be done (e.g. 0.5 Dozen when Dozen is rounded at 1)

[IMP] Throw an error when a key can not be found because of UoMs/picking + extra float_compare

[IMP] Integrate remarks qdp