[MIRROR] Fixes NtosNet Downloader & App themes [MDB IGNORE] (#19433)

* Fixes NtosNet Downloader & App themes (#73500)

## About The Pull Request

NtOS' downloading app is the only application where PC device theme is
actually used by the app directly, instead of handled by NtOS Window. I
forgot about this, and removed it from the data, breaking the TGUI page.

Also two edits;
- NtosWindow now takes their theme directly from PC_device_theme, this
means we're not relying anymore on apps to individually give the theme
they want to have, and tablets will get alerts of downloading illegal
programs if they are on any theme but the syndicate one (instead of not
getting the message if theyre on any but the nt one).
- Removes bad uses of ``as anything`` on stored files, because it holds
more than just programs (like ordnance data).

## Why It's Good For The Game

the NtOS app now works again, sorry for the issue.

Closes https://github.com/tgstation/tgstation/issues/73493
Closes https://github.com/tgstation/tgstation/issues/73507

## Changelog

🆑
fix: NtOS program downloader now works again, and will now properly
alert you of downloading illegal ROMs if you change your theme to
anything that isn't Syndicate.
fix: NtOS themes are now recognized by all windows.
/🆑

* Fixes NtosNet Downloader & App themes

---------

Co-authored-by: John Willard <53777086+JohnFulpWillard@users.noreply.github.com>

code/modules/modular_computers/computers/item/computer_ui.dm

@@ -50,7 +50,6 @@
 
 /obj/item/modular_computer/ui_data(mob/user)
 	var/list/data = get_header_data()
-	data["device_theme"] = device_theme
 
 	data["login"] = list(
 		IDName = saved_identification || "Unknown",
@@ -71,7 +70,7 @@
 		data["removable_media"] += "intelliCard"
 
 	data["programs"] = list()
-	for(var/datum/computer_file/program/program as anything in stored_files)
+	for(var/datum/computer_file/program/program in stored_files)
 		data["programs"] += list(list(
 			"name" = program.filename,
 			"desc" = program.filedesc,

code/modules/modular_computers/computers/item/pda.dm

@@ -175,7 +175,7 @@
 /obj/item/modular_computer/pda/proc/get_detomatix_difficulty()
 	var/detomatix_difficulty
 
-	for(var/datum/computer_file/program/downloaded_apps as anything in stored_files)
+	for(var/datum/computer_file/program/downloaded_apps in stored_files)
 		detomatix_difficulty += downloaded_apps.detomatix_resistance
 
 	return detomatix_difficulty