Pause the game when users navigate to the options menu in SP mode

OpenRA.Mods.RA/Missions/Allies01Script.cs

@@ -306,7 +306,7 @@ namespace OpenRA.Mods.RA.Missions
 
 			Game.MoveViewport(insertionLZ.Location.ToFloat2());
 
-			if (MissionUtils.IsSingleClient(world))
+			if (w.LobbyInfo.IsSinglePlayer)
 				Media.PlayFMVFullscreen(w, "ally1.vqa", () =>
 					Media.PlayFMVFullscreen(w, "landing.vqa", () =>
 					{

OpenRA.Mods.RA/Missions/MissionUtils.cs

@@ -121,11 +121,6 @@ namespace OpenRA.Mods.RA.Missions
 			return world.Actors.FirstOrDefault(a => a.HasTrait<Cargo>() && a.Trait<Cargo>().Passengers.Contains(actor));
 		}
 
-		public static bool IsSingleClient(World world)
-		{
-			return world.LobbyInfo.Clients.Count() == 1;
-		}
-
 		public static void PlayMissionMusic()
 		{
 			if (!Rules.InstalledMusic.Any()) return;

OpenRA.Mods.RA/Missions/Soviet01ClassicScript.cs

@@ -160,7 +160,7 @@ namespace OpenRA.Mods.RA.Missions
 
 			Game.MoveViewport(startJeep.Location.ToFloat2());
 
-			if (MissionUtils.IsSingleClient(world))
+			if (w.LobbyInfo.IsSinglePlayer)
 			{
 				Media.PlayFMVFullscreen(w, "soviet1.vqa", () =>
 				{