Graffiti centers on where you click. (#9255)

* Graffiti centers on where you click.

* Oversights, and pixelshifted engravings.

* Better returns

code/modules/persistence/effects/trash.dm

@@ -1,5 +1,6 @@
 /datum/persistent/filth/trash
 	name = "trash"
+	has_admin_data = FALSE
 
 /datum/persistent/filth/trash/CheckTurfContents(var/turf/T, var/list/tokens)
 	var/too_much_trash = 0
@@ -14,4 +15,4 @@
 	return trash.age
 
 /datum/persistent/filth/trash/GetEntryPath(var/atom/entry)
-	return entry.type
+	return entry.type