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/instruments/objs/items/headphones.dm

@@ -25,9 +25,7 @@
 		ui_interact(user)
 	else
 		on = !on
-		icon_state = "headphones[on]"
-		item_state = "headphones[on]"
-		update_icon()
+		update_icon(UPDATE_ICON_STATE)
 
 /obj/item/clothing/ears/headphones/ui_data(mob/user)
 	return song.ui_data(user)
@@ -42,12 +40,12 @@
 		return
 	return song.ui_act(action, params)
 
-/obj/item/clothing/ears/headphones/update_icon()
+/obj/item/clothing/ears/headphones/update_icon_state()
 	var/mob/living/carbon/human/user = loc
 	if(istype(user))
 		user.update_action_buttons_icon()
 		user.update_inv_ears()
-	..()
+	icon_state = item_state = "headphones[on]"
 
 /obj/item/clothing/ears/headphones/item_action_slot_check(slot)
 	if(slot == slot_l_ear || slot == slot_r_ear)
@@ -57,15 +55,15 @@
   * Called by a component signal when our song starts playing.
   */
 /obj/item/clothing/ears/headphones/proc/start_playing()
-	icon_state = item_state = "headphones1"
-	update_icon()
+	on = TRUE
+	update_icon(UPDATE_ICON_STATE)
 
 /**
   * Called by a component signal when our song stops playing.
   */
 /obj/item/clothing/ears/headphones/proc/stop_playing()
-	icon_state = item_state = "headphones0"
-	update_icon()
+	on = FALSE
+	update_icon(UPDATE_ICON_STATE)
 
 /**
   * Whether the headphone's song should stop playing