Setup needs to enable the theme it will assign as site default

--HG--
branch : perf
extra : transplant_source : 6%07%B8%E6%2A%0F%F5f%DB%0DFa%A5%A5X%3Ac%9C%DE%9B

src/Orchard.Web/Modules/Orchard.Setup/Services/SetupService.cs

@@ -95,7 +95,8 @@ namespace Orchard.Setup.Services {
                     "Orchard.Tags",
                     "Orchard.Media",
                     "Orchard.Widgets",
-                    "Orchard.jQuery"
+                    "Orchard.jQuery",
+                    "TheThemeMachine",
                 };
 
                 context.EnabledFeatures = hardcoded;