Add party to lobby menu

Assets/Scripts/Managers/GameManager.cs

@@ -62,6 +62,19 @@ public class GameManager : NetworkBehaviour
         networkManager.StartHost();
     }
 
+    public void LeaveGame()
+    {
+        networkManager.Shutdown(true);
+        //if (networkManager.IsHost)
+        //{
+        //    networkManager.Shutdown(true);
+        //}
+        //else
+        //{
+        //    networkManager.
+        //}
+    }
+
     private void OnClientStarted()
     {
         OnConnected?.Invoke();