add option to disable end of round sound (#26014)

* add option to disable end of round sound

* fix sleep position

* add EOR sound to enable/disable preferences

* invert logic so that existing players don't mute the sound

* fix inconsistent mute/hear variable

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Co-authored-by: pwbokie <pmerkamp@butler.edu>

code/controllers/subsystem/SSticker.dm

@@ -744,10 +744,14 @@ SUBSYSTEM_DEF(ticker)
 	if(end_string)
 		end_state = end_string
 
-	// Play a haha funny noise
+	// Play a haha funny noise for those who want to hear it :)
 	var/round_end_sound = pick(GLOB.round_end_sounds)
 	var/sound_length = GLOB.round_end_sounds[round_end_sound]
-	SEND_SOUND(world, sound(round_end_sound))
+
+	for(var/mob/M in GLOB.player_list)
+		if(!(M.client.prefs.sound & SOUND_MUTE_END_OF_ROUND))
+			SEND_SOUND(M, round_end_sound)
+
 	sleep(sound_length)
 
 	world.Reboot()