Fixes #5228

Expanded the Research outpost room a bit. It is now possible to refill the supply line with air (or less healthy options).
Moved the scrubber 'behind' the filter line to allow recycling gases in the room, rather than have it direct gases directly into space.
Makes the scrubber port actually have some use, would previously equalize with space (leaving it empty).
https://www.dropbox.com/s/d9v0het6ky59zi9/NewResearchDist.png?dl=1

Additional:
Cleans up some areas outside the Research outpost, that were in space/on the asteroid.
A previously replaced floor tile under a door had turned into space. Corrected.
Adds windoor/glass protection around a disposal inlet that kept throwing me into space during testing...
Adds a filter to ensure appropriate oxygen/nitrogen mixing, at the price of losing a heater (the remaining cooler should be able to both heat and cool towards 20C, if experiments in the engine are to be trusted).

The Research cooler is now on by default.
Merge remote-tracking branch 'upstream/dev' into ResearchDist
Merge pull request #5304 from PsiOmegaDelta/ResearchDist

"Fixes" #5228