Implement Bay's SSmachinery and power usage updates, further unclogging the toilet (#13910)

code/game/objects/structures/therapy.dm

@@ -225,7 +225,6 @@
 	density = 1
 	anchored = 1
 
-	use_power = 1
 	idle_power_usage = 60
 	active_power_usage = 10000
 
@@ -296,7 +295,7 @@
 	usr.client.eye = src
 	usr.forceMove(src)
 	src.occupant = WEAKREF(usr)
-	update_use_power(2)
+	update_use_power(POWER_USE_ACTIVE)
 	flick("[initial(icon_state)]-anim", src)
 	update_icon()
 	src.add_fingerprint(usr)
@@ -319,7 +318,7 @@
 		H.client.perspective = MOB_PERSPECTIVE
 	H.forceMove(get_turf(src))
 	occupant = null
-	update_use_power(1)
+	update_use_power(POWER_USE_IDLE)
 	flick("[initial(icon_state)]-anim", src)
 	update_icon()
 	return
@@ -350,7 +349,7 @@
 		L.forceMove(src)
 		occupant = WEAKREF(L)
 
-		update_use_power(2)
+		update_use_power(POWER_USE_ACTIVE)
 		flick("[initial(icon_state)]-anim", src)
 		update_icon()
 
@@ -389,7 +388,7 @@
 			H.client.eye = src
 		H.forceMove(src)
 		occupant = WEAKREF(H)
-		update_use_power(2)
+		update_use_power(POWER_USE_ACTIVE)
 		flick("[initial(icon_state)]-anim", src)
 		update_icon()
 	src.add_fingerprint(user)

code/game/objects/structures/watercloset.dm

@@ -133,7 +133,7 @@
 	icon_state = "shower"
 	density = 0
 	anchored = 1
-	use_power = 0
+	use_power = POWER_USE_OFF
 	var/spray_amount = 20
 	var/on = 0
 	var/obj/effect/mist/mymist = null
@@ -349,7 +349,7 @@
 			if(istype(E,/obj/effect/rune) || istype(E,/obj/effect/decal/cleanable) || istype(E,/obj/effect/overlay))
 				qdel(E)
 
-/obj/machinery/shower/machinery_process()
+/obj/machinery/shower/process()
 	if(!on)
 		return
 	wash_floor()

code/game/objects/structures/window.dm

@@ -550,7 +550,7 @@
 	toggle_tint()
 
 /obj/machinery/button/switch/windowtint/proc/toggle_tint()
-	use_power(5)
+	use_power_oneoff(5)
 
 	active = !active
 	update_icon()