Repath canisters; make label code create a new can; use es6 function shorthand

By making a new canister when relabeled, we can make the name/desc identical to a
mapped canister, and remove hacky snowflake code

code/modules/flufftext/Hallucination.dm

@@ -128,7 +128,7 @@ Gunshots/explosions/opening doors/less rare audio (done)
 		if(!U.welded)
 			src.loc = U.loc
 			break
-	image_state = pick("plasma","sleeping_agent")
+	image_state = pick("plasma","nitrous_oxide")
 	flood_images += image(image_icon,src,image_state,MOB_LAYER)
 	flood_turfs += get_turf(src.loc)
 	if(target.client) target.client.images |= flood_images