Port TG updating appearances (#17943)

* Get pants that match or else you gonna look silly yo

* Posters

* Fix other hud elements

* Rereviewed

* Update shotglass.dm

* Fix for new merged PRs

* Typo

* Coming across other stuff

* Update theblob.dm

* No takebacksies

* smh i forget to leave a comment

* Updated for the detgun and cards

* Should have rerun langserver again

* No longer plastic, more in scope

* Damn you bluespace

* Reverting turret logic, out of scope at this point

* Tweak that part

* Went over energy guns again, and fixed UI White's sprite sheet

* Welding masks, glasses, and JUSTICE

* Update portable_atmospherics.dm

* Cleaning up, clearing things up

* Review and suggestions

* Update valve.dm

* More tweaks

* Missing character

* Not distinct lightmasks, so they can be overlays

* Update generator.dm

* Add parameter so holodeck doesn't try to make a perfect copy

* Update unsorted.dm

* Spiders

* Better fix for spiders, fix vamps too

* Ghosts

* Update telekinesis.dm

* Cleaning up old procs

* It's set up to not copy datums... Unless they're in a list

* Donuts, duct tape, and detgun. D3VR coming to Early Access

* Update procs that interact with doors so they call update_state instead

* Forgot one spot, and actually might as well just force lock

* Cleaning up other things... Sigh, and kitty ears

* oops

* Getting used to how it works

* blinds

* Going back to the suit obscuring thing, so it doesn't update all the time

* Missed that from merging master

* I made this PR and forgot about it

* Fix runtimes in cards

* Make things a bit more unified

* Update update_icons.dm

* yarn, really?

* Update library_equipment.dm

* Update shieldgen.dm

* Every time Charlie merges something, I go back and see if I can improve things further

* what's this? more?

* Update misc_special.dm

* wow, paper

* Review

* More reviews

* To be sure, seems like being broken messed something sometimes

* Brought airlocks closer to how TG works to iron out some stuff

* Pizza and morgue

* Doesn't seem to hurt, tried with holodeck

* Revert "Doesn't seem to hurt, tried with holodeck"

This reverts commit 158529302b.

* Icon conflict

* Fix organ damage

* Don't ask how. Why. It's like that on prod too.

* Cutting down on things and updating from TG.

* More flexible. Just in case the thing you stuck it on didn't destroy.

* Hydro was one the things I touched earlier on, better rework it

* Reviews

* Cleaning up further, also bri'ish

* Undo a change I did, and switch over to a more recent implementation

* Update biogenerator.dm

* Rolling back to old airlocks, but with new duct taped note

* Functionally the same. I'd just rather not have the smoothing happen there

* Went over APCs again

* Fix welding helmet names in species files

* Update airlock.dm

* Update persistent_overlay.dm

* Oh, topic

code/modules/security_levels/keycard_authentication.dm

@@ -197,7 +197,7 @@ GLOBAL_VAR_INIT(station_all_access, 0)
 	for(var/area/maintenance/A in world) // Why are these global lists? AAAAAAAAAAAAAA
 		for(var/obj/machinery/door/airlock/D in A)
 			D.emergency = 1
-			D.update_icon(0)
+			D.update_appearance()
 	GLOB.minor_announcement.Announce("Access restrictions on maintenance and external airlocks have been removed.")
 	GLOB.maint_all_access = 1
 	SSblackbox.record_feedback("nested tally", "keycard_auths", 1, list("emergency maintenance access", "enabled"))
@@ -206,7 +206,7 @@ GLOBAL_VAR_INIT(station_all_access, 0)
 	for(var/area/maintenance/A in world)
 		for(var/obj/machinery/door/airlock/D in A)
 			D.emergency = 0
-			D.update_icon(0)
+			D.update_appearance()
 	GLOB.minor_announcement.Announce("Access restrictions on maintenance and external airlocks have been re-added.")
 	GLOB.maint_all_access = 0
 	SSblackbox.record_feedback("nested tally", "keycard_auths", 1, list("emergency maintenance access", "disabled"))
@@ -215,7 +215,7 @@ GLOBAL_VAR_INIT(station_all_access, 0)
 	for(var/obj/machinery/door/airlock/D in GLOB.airlocks)
 		if(is_station_level(D.z))
 			D.emergency = 1
-			D.update_icon(0)
+			D.update_appearance()
 	GLOB.minor_announcement.Announce("Access restrictions on all station airlocks have been removed due to an ongoing crisis. Trespassing laws still apply unless ordered otherwise by Command staff.")
 	GLOB.station_all_access = 1
 	SSblackbox.record_feedback("nested tally", "keycard_auths", 1, list("emergency station access", "enabled"))
@@ -224,7 +224,7 @@ GLOBAL_VAR_INIT(station_all_access, 0)
 	for(var/obj/machinery/door/airlock/D in GLOB.airlocks)
 		if(is_station_level(D.z))
 			D.emergency = 0
-			D.update_icon(0)
+			D.update_appearance()
 	GLOB.minor_announcement.Announce("Access restrictions on all station airlocks have been re-added. Seek station AI or a colleague's assistance if you are stuck.")
 	GLOB.station_all_access = 0
 	SSblackbox.record_feedback("nested tally", "keycard_auths", 1, list("emergency station access", "disabled"))

code/modules/security_levels/security_levels.dm

@@ -60,8 +60,7 @@ GLOBAL_DATUM_INIT(security_announcement_down, /datum/announcement/priority/secur
 
 				var/obj/machinery/door/airlock/highsecurity/red/R = locate(/obj/machinery/door/airlock/highsecurity/red) in GLOB.airlocks
 				if(R && is_station_level(R.z))
-					R.locked = FALSE
-					R.update_icon()
+					R.unlock(TRUE)
 
 				post_status("alert", "redalert")
 				update_firealarms()
@@ -73,8 +72,7 @@ GLOBAL_DATUM_INIT(security_announcement_down, /datum/announcement/priority/secur
 				if(GLOB.security_level < SEC_LEVEL_RED)
 					for(var/obj/machinery/door/airlock/highsecurity/red/R in GLOB.airlocks)
 						if(is_station_level(R.z))
-							R.locked = FALSE
-							R.update_icon()
+							R.unlock(TRUE)
 
 				post_status("alert", "gammaalert")
 				update_firealarms()
@@ -122,11 +120,9 @@ GLOBAL_DATUM_INIT(security_announcement_down, /datum/announcement/priority/secur
 			return "delta"
 
 /proc/update_firealarms()
-	var/security_level = get_security_level()
 	for(var/obj/machinery/firealarm/FA in GLOB.machines)
 		if(is_station_contact(FA.z))
-			FA.cut_overlays()
-			FA.add_overlay("overlay_[security_level]")
+			FA.update_icon()
 
 /proc/num2seclevel(num)
 	switch(num)