[READY] Atmos Refactor Part 7 (I think) - Kills signals + TGUIs stuff (#19867)

* I AM NOT A KING. I AM NOT A GOD. I AM LUNACY.

* THE SCOPE CREEP

* This was done in vi. No langserver. Send help.

* Progress

* Some issues fixed

* The code builds, but the maps dont

* CC builds, I doubt anything else does

* Do this now

* Safety

* The map compiles

* THE MAPPING HELL

* Airlock controllers dont work

* Fixed bombs

* AND THATS FIXED

* Phantom edit

* Restores LL I think

* The mapmerge hooks are actually retarded

* Fixes spawners

* Half working air control

* Picky

* Hyper efficient tank monitor

* Sanity

* Laying the framework

* Improved alert console

* Dont think this is actually done anywhere

* Metering

* ONE HUNDRED AND ~~EIGHTY~~ TWENTY SEVEN

* WE ARE READY FOR BOX TO BUILD

* One map done

* Well that was easy

* Another one

* I think this is done

* I should have removed this

* I would make a russian joke but <current event>

* Delta WIP

* Makes delta work

* Early review

* TM safeguard

* oops

* METAAAAAAAAAAAAAAAAAAAAAAAAA

* Fix #4213

* Trailing

* oh for piss sake

* Shutter fix

* Roundstart ATs can go away

* Review pass 1

* What could go wrong

* BOOM BOOM BOOM

* Not needed

* Fix seed vault

* Oops

* Review changes

code/game/objects/structures/crates_lockers/crates.dm

@@ -346,6 +346,7 @@
 	var/cooling_power = 40
 
 /obj/structure/closet/crate/freezer/return_air()
+	RETURN_TYPE(/datum/gas_mixture)
 	var/datum/gas_mixture/gas = (..())
 	if(!gas)	return null
 	var/datum/gas_mixture/newgas = new/datum/gas_mixture()

code/game/objects/structures/tank_dispenser.dm

@@ -137,7 +137,7 @@
 	to_chat(user, "<span class='notice'>You put [T] in [src].</span>")
 	SStgui.update_uis(src)
 
-/obj/structure/tank_dispenser/deconstruct(disassembled = TRUE)
+/obj/structure/dispenser/deconstruct(disassembled = TRUE)
 	if(!(flags & NODECONSTRUCT))
 		for(var/X in src)
 			var/obj/item/I = X

code/game/objects/structures/transit_tubes/transit_tube_pod.dm

@@ -91,6 +91,7 @@
 // Should I return a copy here? If the caller edits or qdel()s the returned
 //  datum, there might be problems if I don't...
 /obj/structure/transit_tube_pod/return_air()
+	RETURN_TYPE(/datum/gas_mixture)
 	var/datum/gas_mixture/GM = new()
 	GM.copy_from(air_contents)
 	return GM