[NO GBP] Fixes the "Random" deathmatch modifier and turns "Heightened Hearing" into a modifier as well. (#82223)

## About The Pull Request
See the title.

## Why It's Good For The Game
This will fix #82149 

## Changelog

🆑
fix: Fixed the "Random" deathmatch modifier. Also turned the "Heightened
Hearing" option into a modifier as well.
/🆑

code/modules/deathmatch/deathmatch_lobby.dm

@@ -9,8 +9,6 @@
 	var/datum/lazy_template/deathmatch/map
 	/// Our turf reservation AKA where the arena is
 	var/datum/turf_reservation/location
-	/// Whether players hear deadchat and people through walls
-	var/global_chat = FALSE
 	/// Whether the lobby is currently playing
 	var/playing = DEATHMATCH_NOT_PLAYING
 	/// Number of total ready players
@@ -148,9 +146,6 @@
 
 	// register death handling.
 	RegisterSignals(new_player, list(COMSIG_LIVING_DEATH, COMSIG_MOB_GHOSTIZED, COMSIG_QDELETING), PROC_REF(player_died))
-	if (global_chat)
-		ADD_TRAIT(new_player, TRAIT_SIXTHSENSE, INNATE_TRAIT)
-		ADD_TRAIT(new_player, TRAIT_XRAY_HEARING, INNATE_TRAIT)
 
 /datum/deathmatch_lobby/proc/game_took_too_long()
 	if (!location || QDELING(src))
@@ -346,7 +341,6 @@
 	.["self"] = user.ckey
 	.["host"] = is_host
 	.["admin"] = is_admin
-	.["global_chat"] = global_chat
 	.["playing"] = playing
 	.["loadouts"] = list("Randomize")
 	for (var/datum/outfit/deathmatch_loadout/loadout as anything in loadouts)
@@ -483,9 +477,6 @@
 						return FALSE
 					change_map(params["map"])
 					return TRUE
-				if ("global_chat")
-					global_chat = !global_chat
-					return TRUE
 		if("open_mod_menu")
 			mod_menu_open = TRUE
 			return TRUE
@@ -496,18 +487,14 @@
 			var/datum/deathmatch_modifier/modpath = text2path(params["modpath"])
 			if(!ispath(modpath))
 				return TRUE
-			var/global_mod = params["global_mod"]
-			if(global_mod)
-				if(usr.ckey != host && !check_rights(R_ADMIN))
-					return TRUE
-			else if(!(usr.ckey in players))
+			if(usr.ckey != host && !check_rights(R_ADMIN))
 				return TRUE
 			var/datum/deathmatch_modifier/chosen_modifier = GLOB.deathmatch_game.modifiers[modpath]
 			if(modpath in modifiers)
 				chosen_modifier.unselect(src)
 				modifiers -= modpath
 				return TRUE
-			else if(chosen_modifier.selectable(src))
+			if(chosen_modifier.selectable(src))
 				chosen_modifier.on_select(src)
 				modifiers += modpath
 				return TRUE

code/modules/deathmatch/deathmatch_modifier.dm

@@ -478,6 +478,7 @@
 /datum/deathmatch_modifier/random
 	name = "Random Modifiers"
 	description = "Picks 3 to 5 random modifiers as the game is about to start"
+	random_exempted = TRUE
 
 /datum/deathmatch_modifier/random/on_select(datum/deathmatch_lobby/lobby)
 	///remove any other global modifier if chosen. It'll pick random ones when the time comes.
@@ -486,36 +487,32 @@
 		if(modifier.random_exempted)
 			continue
 		modifier.unselect(lobby)
-		lobby -= modpath
+		lobby.modifiers -= modpath
 
 /datum/deathmatch_modifier/random/on_start_game(datum/deathmatch_lobby/lobby)
 	lobby.modifiers -= type //remove it before attempting to select other modifiers, or they'll fail.
 
 	var/static/list/static_pool
-	if(!static_pool)
+	if(isnull(static_pool))
 		static_pool = subtypesof(/datum/deathmatch_modifier)
 		for(var/datum/deathmatch_modifier/modpath as anything in static_pool)
 			if(initial(modpath.random_exempted))
 				static_pool -= modpath
 	var/list/modifiers_pool = static_pool.Copy()
+	for(var/modpath in modifiers_pool)
+		var/datum/deathmatch_modifier/modifier = GLOB.deathmatch_game.modifiers[modpath]
+		if(!modifier.selectable(lobby))
+			modifiers_pool -= modpath
 
 	///Pick global modifiers at random.
 	for(var/iteration in rand(3, 5))
-		var/mod_len = length(modifiers_pool)
-		if(!mod_len)
-			break
-		var/datum/deathmatch_modifier/modifier
-		if(mod_len > 1)
-			modifier = GLOB.deathmatch_game.modifiers[pick_n_take(modifiers_pool)]
-		else //pick() throws errors if the list has only one element iirc.
-			modifier = GLOB.deathmatch_game.modifiers[modifiers_pool[1]]
-			modifiers_pool = null
-		if(!modifier.selectable(lobby))
-			continue
+		var/datum/deathmatch_modifier/modifier = GLOB.deathmatch_game.modifiers[pick_n_take(modifiers_pool)]
 		modifier.on_select(lobby)
 		modifier.on_start_game(lobby)
-		lobby += modifier
+		lobby += modifier.type
 		modifiers_pool -= modifier.blacklisted_modifiers
+		if(!length(modifiers_pool))
+			return
 
 /datum/deathmatch_modifier/any_loadout
 	name = "Any Loadout Allowed"
@@ -539,3 +536,11 @@
 		lobby.modifiers -= type
 	else
 		lobby.loadouts = GLOB.deathmatch_game.loadouts
+
+/datum/deathmatch_modifier/hear_global_chat
+	name = "Heightened Hearing"
+	description = "This lets you hear people through wall, as well as deadchat"
+	random_exempted = TRUE
+
+/datum/deathmatch_modifier/hear_global_chat/apply(mob/living/carbon/player, datum/deathmatch_lobby/lobby)
+	player.add_traits(list(TRAIT_SIXTHSENSE, TRAIT_XRAY_HEARING), DEATHMATCH_TRAIT)

tgui/packages/tgui/interfaces/DeathmatchLobby.tsx

@@ -36,7 +36,6 @@ type Data = {
   self: string;
   host: BooleanLike;
   admin: BooleanLike;
-  global_chat: BooleanLike;
   playing: BooleanLike;
   loadouts: string[];
   maps: string[];
@@ -174,17 +173,6 @@ export const DeathmatchLobby = (props) => {
                 <br />
                 Current players: <b>{Object.keys(data.players).length}</b>
               </Box>
-              <Button.Checkbox
-                checked={data.global_chat}
-                disabled={!(data.host || data.admin)}
-                content="Heightened Hearing"
-                tooltip="Players can hear ghosts and hear through walls."
-                onClick={() =>
-                  act('host', {
-                    func: 'global_chat',
-                  })
-                }
-              />
               <Divider />
               <Box textAlign="center">{data.active_mods}</Box>
               {(!!data.admin || !!data.host) && (