Fixed gatebot holograms not appearing on an A start.

Nav adjustments.
Added failsafe teleport for frontline bots spawning at B, though hopefully nav adjustments will prevent that from occurring entirely.

Implemented alternative fixed spawn and initialization setup for mission makers.
Added relay to block dropdowns around hatch area for mission makers.
Isolated func_respawnroom rooms.
Nav adjustments.

Blocked cubby underneath submarine.
Replaced bot navigation floor holograms with models.
Packed missions.
Nav adjustments.