Added overhead light to three default shelters

[Night-Pryanik]

Summary

Content "Added overhead light to three default shelters"

Purpose of change

Three default shelters are completely dark. This is both strange (why there's no light, but computer nearby is working?) and probably confusing for new players.

Describe the solution

Added overhead light to three default shelters.

Describe alternatives you've considered

None.

Testing

Debug-spawned locations in the game.

Additional context

[meladath]

I believe the original reason behind this was that it reduced the chances of people getting attacked by any hostile mobs within sight of the shelter since the windows/curtains are open.

Could be completely wrong on that though...

[Night-Pryanik]

Ok, then I think it would be better to make all windows in these shelters spawn with closed curtains.

[NetSysFire]

Would fit super well into upstream, too. Nice catch. I wonder if, using the new power grid feature, one can connect the solar panel on the roof with the computer and the lights yet in the mapgen definitions.