Ports techweb backend refactor & co.

from https://github.com/Citadel-Station-13/Citadel-Station-13/pull/9737

code/modules/research/nanites/nanite_program_hub.dm

@@ -69,7 +69,7 @@
 	if(current_category != "Main")
 		var/list/program_list = list()
 		for(var/i in linked_techweb.researched_designs)
-			var/datum/design/nanites/D = linked_techweb.researched_designs[i]
+			var/datum/design/nanites/D = SSresearch.techweb_design_by_id(i)
 			if(!istype(D))
 				continue
 			if(current_category in D.category)
@@ -116,9 +116,9 @@
 				disk.program = null
 				disk.name = initial(disk.name)
 			. = TRUE
-	
-	
+
+
 /obj/machinery/nanite_program_hub/admin/Initialize()
 	. = ..()
 	linked_techweb = SSresearch.admin_tech
-	
+