Useful Fire Extinguishers (#10063)

You can now only hit people with fire extinguishers if you are on hurt intent.
    Extinguisher refills now fit in your backpack, fire extinguishers now do not.
    Foam from fire extinguishers now go onto mobs as well, instead of just the turfs.
    Halved the amount of volume extinguisher refill canisters have.

code/game/objects/effects/chem/water.dm

@@ -28,6 +28,10 @@
 			if(T == get_turf(target))
 				break
 		sleep(delay)
+	if(length(reagents))
+		var/mob/M = locate() in get_turf(src)
+		if(M)
+			reagents.trans_to(M, reagents.get_reagent_amount() * 0.75)
 	sleep(lifespan)
 	qdel(src)