The Great Unswitchening: The Final Chapter

Created by: Exxion

Unless I am mistaken, only Meta and Box were broken by 9c212446. Box has already been fixed. Here are the fixes to Meta. There may still be issues, as this approach was substantially less manual than the approach I used for Box. Meta was vastly more fucked than Box, though, so it would have been impractical to do it that way. But any such issues will be much less bad than the current ones and will most likely be related to scrubbers not scrubbing the correct gases. There won't be anything major like scrubbers scrubbing O2 or N2 where they shouldn't, just some not scrubbing CO2 or Plasma when they should and maybe the same for N2O. They were already weird anyway, so it's unlikely anyone will notice a difference, if there even is one.

Fixes #4447 (closed).