Changes all cases of update_icons(), updateicon(), UpdateIcon() etc. to update_icon(). (#9432)

update_icons(), UpdateIcon() and updateicon() are now changed to be update_icon().

Many interactions expect a target to have an update_icon(), so they should all be the same.

Also fixed some stuff that was using relative pathing, along the way.

code/game/objects/items/weapons/cloaking_device.dm

@@ -166,7 +166,7 @@
 	var/mob/living/L = target
 	L.cloaked = 1
 	L.mouse_opacity = 0
-	L.update_icons()
+	L.update_icon()
 
 
 /datum/modifier/cloaking_device/deactivate()
@@ -180,7 +180,7 @@
 	var/mob/living/L = target
 	L.cloaked = 0
 	L.mouse_opacity = 1
-	L.update_icons()
+	L.update_icon()
 
 
 /datum/modifier/cloaking_device/check_validity()

code/game/objects/items/weapons/grenades/flashbang.dm

@@ -98,7 +98,7 @@
 	else
 		if (M.ear_damage >= 5)
 			to_chat(M, "<span class='danger'>Your ears start to ring!</span>")
-	M.update_icons()
+	M.update_icon()
 
 /obj/item/grenade/flashbang/clusterbang//Created by Polymorph, fixed by Sieve
 	name = "clusterbang"

code/game/objects/items/weapons/storage/bags.dm

@@ -207,7 +207,7 @@
 
 	if(!inserted || !S.amount)
 		usr.remove_from_mob(S)
-		usr.update_icons()	//update our overlays
+		usr.update_icon()	//update our overlays
 		if (usr.client && usr.s_active != src)
 			usr.client.screen -= S
 		S.dropped(usr)

code/game/objects/items/weapons/storage/storage.dm

@@ -399,7 +399,7 @@
 
 /obj/item/storage/proc/handle_storage_deferred(mob/user)
 	add_fingerprint(user)
-	user.update_icons()
+	user.update_icon()
 	orient2hud(user)
 	if (user.s_active)
 		user.s_active.show_to(user)