Makes fire extinguishers effective at putting out mob fires

Doubles the amount of water extinguishers carry and quadruples the
amount of water sprayed with each use. Halves the damage taken by slimes
when exposed to water to compensate.

Also refactors chair propelling a bit.

code/modules/reagents/Chemistry-Reagents/Chemistry-Reagents-Core.dm

@@ -143,26 +143,26 @@
 		environment.add_thermal_energy(-removed_heat)
 		if (prob(5))
 			T.visible_message("<span class='warning'>The water sizzles as it lands on \the [T]!</span>")
-	else
-		if(volume >= 3)
-			if(T.wet >= 1)
+	
+	else if(volume >= 10)
+		if(T.wet >= 1)
+			return
+		T.wet = 1
+		if(T.wet_overlay)
+			T.overlays -= T.wet_overlay
+			T.wet_overlay = null
+		T.wet_overlay = image('icons/effects/water.dmi',T,"wet_floor")
+		T.overlays += T.wet_overlay
+
+		spawn(800) // This is terrible and needs to be changed when possible.
+			if(!T || !istype(T))
 				return
-			T.wet = 1
+			if(T.wet >= 2)
+				return
+			T.wet = 0
 			if(T.wet_overlay)
 				T.overlays -= T.wet_overlay
 				T.wet_overlay = null
-			T.wet_overlay = image('icons/effects/water.dmi',T,"wet_floor")
-			T.overlays += T.wet_overlay
-
-			spawn(800) // This is terrible and needs to be changed when possible.
-				if(!T || !istype(T))
-					return
-				if(T.wet >= 2)
-					return
-				T.wet = 0
-				if(T.wet_overlay)
-					T.overlays -= T.wet_overlay
-					T.wet_overlay = null
 
 /datum/reagent/water/touch_obj(var/obj/O)
 	if(istype(O, /obj/item/weapon/reagent_containers/food/snacks/monkeycube))
@@ -184,7 +184,7 @@
 /datum/reagent/water/affect_touch(var/mob/living/carbon/M, var/alien, var/removed)
 	if(istype(M, /mob/living/carbon/slime))
 		var/mob/living/carbon/slime/S = M
-		S.adjustToxLoss(15 * removed) // Babies have 150 health, adults have 200; So, 10 units and 13.5
+		S.adjustToxLoss(8 * removed) // Babies have 150 health, adults have 200; So, 10 units and 13.5
 		if(!S.client)
 			if(S.Target) // Like cats
 				S.Target = null