Forced Department Heads

[Mordent]

After initial jobs are chosen via preferences, add an extra step that goes like this:

• Is captain filled? If not, upgrade HoP.
  
• Is HoP filled? If not, pick from a random department head.
  
• Are department heads filled? If not, pick from a random member of that department (if any).
  

Loop through this until it's happy or until no progress is made during a loop (e.g. no one was picked as medical staff, so no MD).

I would like to explicitly exclude "is AI filled? If not, pick from random cyborg" from this list, because playing the two is a VERY different experience, whereas department heads just have more access and a bigger target on their back.

This could partly absorb the "Deputy" suggestion here.