Add a function to World for setting just the local pause state, and add a lock variable to prevent further pause state changes

OpenRA.Game/World.cs

@@ -188,14 +188,23 @@ namespace OpenRA
 
 		public bool Paused { get; internal set; }
 		public bool PredictedPaused { get; internal set; }
+		public bool PauseStateLocked { get; set; }
 		public bool IsShellmap = false;
 
 		public void SetPauseState(bool paused)
 		{
+			if (PauseStateLocked)
+				return;
+
 			IssueOrder(Order.PauseGame(paused));
 			PredictedPaused = paused;
 		}
 
+		public void SetLocalPauseState(bool paused)
+		{
+			Paused = PredictedPaused = paused;
+		}
+
 		public void Tick()
 		{
 			if (!Paused && (!IsShellmap || Game.Settings.Game.ShowShellmap))