* Fix several jank issues with space ninja cell upgrades.
* Rework the code to comply with maintainer request.
* Fix some naming convention & formatting errors.
* Change from a custom check to an item whitelist to avoid power cages from fitting.
* Make the EntityUid of GetCellScore non nullable.
* Remove a line from a previous solution to the above problem I forgot to remove.
* Fix the magic number issue.
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