If changed settings require a restart, offer the user to do it now.

Add a dialog when closing the settings screen asking the user if they would like to restart the game now in order to apply any settings that are only applied after restarting the game. The game is reloaded in-process by spinning up a new AppDomain in order to reset state.

OpenRA.Game/Game.cs

@@ -14,8 +14,8 @@ using System.Drawing;
 using System.IO;
 using System.Linq;
 using System.Net;
-using OpenRA.FileSystem;
 using MaxMind.GeoIP2;
+using OpenRA.FileSystem;
 using OpenRA.Graphics;
 using OpenRA.Network;
 using OpenRA.Primitives;
@@ -464,7 +464,7 @@ namespace OpenRA
 			return shellmaps.Random(CosmeticRandom);
 		}
 
-		static bool quit;
+		static RunStatus state = RunStatus.Running;
 		public static event Action OnQuit = () => { };
 
 		static double idealFrameTime;
@@ -473,7 +473,7 @@ namespace OpenRA
 			idealFrameTime = 1.0 / fps;
 		}
 
-		internal static void Run()
+		internal static RunStatus Run()
 		{
 			if (Settings.Graphics.MaxFramerate < 1)
 			{
@@ -483,7 +483,7 @@ namespace OpenRA
 
 			SetIdealFrameTime(Settings.Graphics.MaxFramerate);
 
-			while (!quit)
+			while (state == RunStatus.Running)
 			{
 				if (Settings.Graphics.CapFramerate)
 				{
@@ -506,9 +506,19 @@ namespace OpenRA
 			Renderer.Device.Dispose();
 
 			OnQuit();
+
+			return state;
 		}
 
-		public static void Exit() { quit = true; }
+		public static void Exit()
+		{
+			state = RunStatus.Success;
+		}
+
+		public static void Restart()
+		{
+			state = RunStatus.Restart;
+		}
 
 		public static Action<Color, string, string> AddChatLine = (c, n, s) => { };