Added fallback via reloading save for rare issue where quest wasn't updating once all three keys were acquired, or The Guardian remained disabled. Note that I haven't been able to reproduce this.
Possible fix for Unchained and engine issue causing the side quest to inexplicably break, despite being set up the same way as the rest. Talk with Charoe outside instead of the trigger.
Fixed rare issue where Ishki wouldn't go inside temple to start scene and progress the side quest.
Added option in the Ratway to teleport back to the surface by activating the door nearby.
