Fixes and tweaks — Northern Journey Steam update #824378

There was a missing drowning volume in Darkthroath, leading to infinite falling. Has been added. Trollhole tweaks: Added two more small messages, telling the player the Save function will be available in a few seconds (The enemy needs to deactivate) Added some health for better waypointing. The bait function will give the player a bit more time. Shooting the guardian at the lower waters will make it deactivate a bit longer. Added some more health and weapons by the white ghost in Deadwell.