When assisting the shop PaisleyGrace with a question about an order with a missing label, we noticed that the Setup > Shipping > View Credit History section shows that labels were purchased for a specific packing slip ID. When attempting to search by Packing Slip ID, we get no results. Packing Slip IDs need to be searchable so we can locate more information about when the label was purchased (and by who) if the shop has questions.