Unload zone fixes

[bombasticSlacks]

Summary

None

Purpose of change

made a mistake and somewhat broke unload and sort zones under certain conditions.

Describe the solution

Added a unit test, fixed an issue with a specific conditional always returning instead of continuing execution.

The actual code is the two lines in activity_item_handling, everything else is for the unit test.

Describe alternatives you've considered

Testing

Unit test attached was basically what I did in game.

Additional context

[stale[bot]]

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