Horizon Wyvern [Crossplay]

Fixed issue with nest spawning on Servers (turns out Wildcard put Wyvern nests in the Overseer arena, and that's where they were trying and failing to spawn them )
Fixed the nests appearing blocky
Another attempt to fix nests deleting themselves while they have eggs
Added a normal sized variant with blue eyes and fire, and a dark black, blue and purple colourset: the Nightflame wyvern. They spawn slightly less frequently, also on Carnivore Island
Classname for spawn commands: Wyvern_Character_BP_Nightflame_H_C