510 Improved Overlays

Fixes auto blindness and no click on 510 servers, lessens the lag of
mesons and material scanners, and I suspect the general speed as well.

I only made it work for Polaris (and by extention, to our server, Eros),
and adapted it a bit.

Ported from:

https://github.com/Baystation12/Baystation12/commit/7c2cc890abf840b1a9967bc26c36581301e7229c

code/modules/client/client procs.dm

@@ -157,7 +157,7 @@
 	nanomanager.send_resources(src)
 
 	if(!void)
-		void = new()
+		void = void.MakeGreed()
 	screen += void
 
 	if(prefs.lastchangelog != changelog_hash) //bolds the changelog button on the interface so we know there are updates.