Added additional underwater areas

Improved underwater physics for enemy death movement and ground vehicles

Improved various underwater FX

Player ship hull and shield is now replenished between levels

Fixed a bug where pickups could spawn inside cave geometry

Fixed underwater bubbles being able to pass into non-water rooms

Fixed droplets not colliding with liquid surfaces

Fixed missing view submerge / emerge sounds for spectators

Fixed homing weapons not prioritising mines over other targets

Fixed teleport activation not being replicated on clients

Fixed Napalm ammo pickup message

Fixed star map destination message position not scaling properly with aspect ratio