Better Horde Mode [QoL, Open Source]

- Fixed ridden mission dinos' rider being killed when their mount should be teleported instead
- Mission dino riders now correctly are using the unstuck logic after their mount was killed
- Fixed teleport VFX staying indefinitely
- Fixed teleport VFX not spawning at all on server clients
- Reworked "below mission crate" distance logic
- Outpost sniper miniboss now also is being teleported back up on bridges
- Outpost loot crate key now is being relocated to the crate when it drops out of mission bounds (Note that the vanilla behaviour of the crates already has a 2.5 minute timer after which it can be opened without the key)
- Unstuck teleports now should choose to remove the mission enemy much more rarely (It has more options to choose from now)