Merge pull request #11078 from Fox-McCloud/goonchem-reagent-temperature

[Goonchem] Reagent Temperature and Pyrotechnics

code/game/objects/effects/effect_system/effects_chem_smoke.dm

@@ -7,6 +7,7 @@
 	icon_state = "smoke"
 	density = FALSE
 	opacity = FALSE
+	layer = ABOVE_MOB_LAYER
 	animate_movement = NO_STEPS
 	var/matrix/first = matrix()
 	var/matrix/second = matrix()

code/game/objects/effects/effect_system/effects_foam.dm

@@ -84,7 +84,10 @@
 
 // foam disolves when heated
 // except metal foams
-/obj/effect/particle_effect/foam/temperature_expose(datum/gas_mixture/air, exposed_temperature, exposed_volume)
+/obj/effect/particle_effect/foam/fire_act(datum/gas_mixture/air, exposed_temperature, exposed_volume, global_overlay = TRUE) //Don't heat the reagents inside
+	return
+
+/obj/effect/particle_effect/foam/temperature_expose(datum/gas_mixture/air, exposed_temperature, exposed_volume) // overriden to prevent weird behaviors with heating reagents inside
 	if(!metal && prob(max(0, exposed_temperature - 475)))
 		flick("[icon_state]-disolve", src)