Fixes.

Made glowshrooms and intercoms not use a ridiculous internal loop, and fixed a pickup luminosity bug with glowshrooms.
fixes #3708
Fixes #3718
Fixes #3702

Signed-off-by: Mloc-Argent <colmohici@gmail.com>

code/game/objects/effects/glowshroom.dm

@@ -16,6 +16,8 @@
 	var/spreadChance = 40
 	var/spreadIntoAdjacentChance = 60
 	var/evolveChance = 2
+	var/lastTick = 0
+	var/spreaded = 1
 
 /obj/effect/glowshroom/single
 	spreadChance = 0
@@ -40,15 +42,21 @@
 	else //if on the floor, glowshroom on-floor sprite
 		icon_state = "glowshroomf"
 
-	spawn(delay)
-		SetLuminosity(round(potency/10))
-		Spread()
+	processing_objects += src
 
-/obj/effect/glowshroom/proc/Spread()
-	set background = 1
-	var/spreaded = 1
+	SetLuminosity(round(potency/10))
+	lastTick = world.timeofday
 
-	while(spreaded)
+/obj/effect/glowshroom/Del()
+	processing_objects -= src
+	..()
+
+/obj/effect/glowshroom/process()
+	if(!spreaded)
+		return
+
+	if(((world.timeofday - lastTick) > delay) || ((world.timeofday - lastTick) < 0))
+		lastTick = world.timeofday
 		spreaded = 0
 
 		for(var/i=1,i<=yield,i++)
@@ -90,8 +98,6 @@
 		if(prob(evolveChance)) //very low chance to evolve on its own
 			potency += rand(4,6)
 
-		sleep(delay)
-
 /obj/effect/glowshroom/proc/CalcDir(turf/location = loc)
 	set background = 1
 	var/direction = 16