EntityControlManager partial rewrite to do lazy updating

Auto commit patches once SE instance has been created

Torch.Server/TorchServer.cs

@@ -103,9 +103,19 @@ namespace Torch.Server
             MyPlugins.Load();
             MyGlobalTypeMetadata.Static.Init();
 
+            Managers.GetManager<ITorchSessionManager>().SessionStateChanged += OnSessionStateChanged;
             GetManager<InstanceManager>().LoadInstance(Config.InstancePath);
         }
 
+        private void OnSessionStateChanged(ITorchSession session, TorchSessionState newState)
+        {
+            if (newState == TorchSessionState.Unloading || newState == TorchSessionState.Unloaded)
+            {
+                _watchdog?.Dispose();
+                _watchdog = null;
+            }
+        }
+
         private void InvokeBeforeRun()
         {
             MySandboxGame.Log.Init("SpaceEngineers-Dedicated.log", MyFinalBuildConstants.APP_VERSION_STRING);