Revert "use guids instead of pointers in DungeonPersistentState. must be much more safe. related to #1406 and some more old. testing."

This reverts commit d44d639605263c8aa7589e28b81b7d63db25a4c2.
use guids instead of pointers in DungeonPersistentState v0.2. must be much more safe. related to #1406 and some more old. testing.