Core/Misc: Fix build after 731b3670febaf72d89776a05164f7663f45821ee (again..)
Scripts/TheBlackMorass: Fix first 7 rifts spawn timings

Partially revert 7e76ab97f895da1320106fad28e31d6b34c15443 to properly spawn first 7 rifts. Also allow only 1 EVENT_NEXT_PORTAL event at time.