Fix Resurrect Achievement Items

[dlglin]

This fixes a couple of issues with the resurrect achievement items in the case where reduced scoring is enabled:

1. Checks whether reduced scoring is enabled rather than checking for the existence of a reduced scoring date.
2. Fixes the messages and the logic when using the item on a set that is in the reduced scoring period. See Error in resurrect achievement items when reduced scoring is enabled #2907 for the discussion of how this is implemented.

This fixes #2907.