Merge pull request #11528 from pchote/migrations

Delete legacy downloaded scores.mix on first run

OpenRA.Game/Game.cs

@@ -345,6 +345,13 @@ namespace OpenRA
 			using (new PerfTimer("LoadMaps"))
 				ModData.MapCache.LoadMaps();
 
+			if (ModData.Manifest.Contains<Migrations>())
+			{
+				var reload = ModData.Manifest.Get<Migrations>().Run();
+				if (reload)
+					InitializeMod(mod, args);
+			}
+
 			var content = ModData.Manifest.Get<ModContent>();
 			var isModContentInstalled = content.Packages
 				.Where(p => p.Value.Required)