Ready Indicator in the lobby (#1771)

* Ready Indicator in the lobby

* Use SessionID instead of Name

* Don't show ready state when game is already running

* Make Ready List not selectable

* -Remove disconnected sessions from Ready
-Fix showing ReadyStatus when staying in lobby

Content.Client/Interfaces/IClientGameTicker.cs

@@ -1,4 +1,6 @@
+using Robust.Shared.Network;
 using System;
+using System.Collections.Generic;
 
 namespace Content.Client.Interfaces
 {
@@ -9,9 +11,11 @@ namespace Content.Client.Interfaces
         bool AreWeReady { get; }
         DateTime StartTime { get; }
         bool Paused { get; }
+        Dictionary<NetSessionId, bool> Ready { get; }
 
         void Initialize();
         event Action InfoBlobUpdated;
         event Action LobbyStatusUpdated;
+        event Action LobbyReadyUpdated;
     }
 }