Spawn Handler Clean-up

Use case-insensitive 'names' instead of "strings", don't lowercase them when stored and instead use case-insensitive ~== operator when comparing them.
Remove redundant first item in logging message.  Yes this will cause an unnecessary ", " to be first, oh well.
Because entries are no longer being altered when stored, simply copy them into their data class arrays.
Added debug logging to handleAmmoUses to finally figure out that
Call append() rather than copy() for ADDING to itemsThatUseThis array, rather than REPLACING them.