Uplink Category Search

Makes it so users can pick categories in the uplink

code/game/objects/items/devices/uplinks.dm

@@ -24,6 +24,7 @@ var/list/world_uplinks = list()
 
 	var/job = null
 	var/show_descriptions = 0
+	var/temp_category = "Ammunition"
 
 /obj/item/uplink/nano_host()
 	return loc
@@ -233,6 +234,7 @@ var/list/world_uplinks = list()
 	if(!nanoui_items)
 		generate_items(user)
 	data["nano_items"] = nanoui_items
+	data["category_choice"] = temp_category
 	data += nanoui_data
 
 	return data
@@ -272,6 +274,9 @@ var/list/world_uplinks = list()
 		if(href_list["descriptions"])
 			show_descriptions = !show_descriptions
 			update_nano_data()
+		if(href_list["category"])
+			temp_category = href_list["category"]
+			update_nano_data()
 
 	SSnanoui.update_uis(src)
 	return 1