Rework history for kit allocations to be more intuitive

[ruestitch]

Summary

Rework display of history for kit allocations to be more intuitive

Why?

head off confusion at the pass

Details

If you modify a kit allocation to add kits, it is currently showing as having a negative number of kits "from" a storage location (and a positive number of items from that location).

While this is correct... it is not intuitive.

Useful for debugging

It should instead, have a positive number of kits "to" the storage location, (and a negative number of items)

Similarly, KitDeallocate should show a positive number of kits "from" the storage location (and a negative number of items)

Criteria for completion

• behaviour as described
• tests to confirm behaviour
• no user guide changes needed

TODO:

• Simulate this current situation and take a screenshot