Merge pull request #13772 from silicons/respawn_system_2

adds a respawn/return to lobby system, tweaks cryo to preserve everything instead of just ""important items""

code/controllers/subsystem/ticker.dm

@@ -371,6 +371,11 @@ SUBSYSTEM_DEF(ticker)
 		if(player.ready == PLAYER_READY_TO_PLAY && player.mind)
 			GLOB.joined_player_list += player.ckey
 			player.create_character(FALSE)
+			if(player.new_character && player.client && player.client.prefs) // we cannot afford a runtime, ever
+				LAZYOR(player.client.prefs.slots_joined_as, player.client.prefs.default_slot)
+				LAZYOR(player.client.prefs.characters_joined_as, player.new_character.real_name)
+			else
+				stack_trace("WARNING: Either a player did not have a new_character, did not have a client, or did not have preferences. This is VERY bad.")
 		else
 			player.new_player_panel()
 		CHECK_TICK