ReadyAll no longer spawns people who are observing

Fixes #4650

Content.Server/Administration/Commands/ReadyAll.cs

@@ -1,5 +1,6 @@
 using Content.Server.GameTicking;
 using Content.Shared.Administration;
+using Content.Shared.GameTicking;
 using Robust.Server.Player;
 using Robust.Shared.Console;
 using Robust.Shared.GameObjects;
@@ -11,7 +12,7 @@ namespace Content.Server.Administration.Commands
     public class ReadyAll : IConsoleCommand
     {
         public string Command => "readyall";
-        public string Description => "Readies up all players in the lobby.";
+        public string Description => "Readies up all players in the lobby, except for observers.";
         public string Help => $"{Command} | ̣{Command} <ready>";
         public void Execute(IConsoleShell shell, string argStr, string[] args)
         {
@@ -34,7 +35,8 @@ namespace Content.Server.Administration.Commands
 
             foreach (var p in playerManager.GetAllPlayers())
             {
-                gameTicker.ToggleReady(p, ready);
+                if(gameTicker.PlayersInLobby[p] != LobbyPlayerStatus.Observer)
+                    gameTicker.ToggleReady(p, ready);
             }
         }
     }

Content.Server/GameTicking/GameTicker.Lobby.cs

@@ -28,6 +28,8 @@ namespace Content.Server.GameTicking
         [ViewVariables]
         private bool _roundStartCountdownHasNotStartedYetDueToNoPlayers;
 
+        public IReadOnlyDictionary<IPlayerSession, LobbyPlayerStatus> PlayersInLobby => _playersInLobby;
+
         private void UpdateInfoText()
         {
             RaiseNetworkEvent(GetInfoMsg(), Filter.Empty().AddPlayers(_playersInLobby.Keys));