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/mining/mine_turfs.dm

@@ -450,7 +450,7 @@ var/list/mining_overlay_cache = list()
 				if(prob(50))
 					M.adjustBruteLoss(5)
 			else
-				flick("flash",M.flash)
+				M.flash_eyes()
 				if(prob(50))
 					M.Stun(5)
 			M.apply_effect(25, IRRADIATE)