Stickers now only have a 10% chance of staying persistent, and only save for 2 days. (#22795)

Sticker spam makes the map really ugly and they're way too easy to come
by, so people can keep spamming offices and stuff constantly. This makes
them not be as much of an eyesore while still sticking around sometimes.

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Co-authored-by: Matt Atlas <liermattia@gmail.com>

code/game/objects/items/sticker.dm

@@ -6,7 +6,7 @@
 	item_flags = ITEM_FLAG_NO_BLUDGEON
 	w_class = WEIGHT_CLASS_TINY
 	vis_flags = VIS_INHERIT_LAYER | VIS_INHERIT_DIR
-	persistant_objects_expiration_time_days = 7
+	persistant_objects_expiration_time_days = 2
 
 	var/datum/weakref/attached
 	var/list/rand_icons
@@ -69,7 +69,8 @@
 	user.drop_from_inventory(src, A)
 	attached = WEAKREF(A)
 	A.add_vis_contents(src)
-	SSpersistence.objectsRegisterTrack(src, ckey(user.key))
+	if(prob(10))
+		SSpersistence.objectsRegisterTrack(src, ckey(user.key))
 
 /obj/item/sticker/proc/remove_sticker(var/mob/user)
 	user.put_in_hands(src)