Fixed redirectTo not working in controllers where no view is imported

This change adds a `import Web.Routes` to every freshly generated `Web.Controller.Prelude`. This ensures that the routing instances are in scope even when no view is imported. Without these instances being in scope, calls to redirectTo will fail.

IHP/IDE/CodeGen/ApplicationGenerator.hs

@@ -60,6 +60,7 @@ generateGenericApplication applicationName =
                 <> "import Application.Helper.Controller\n"
                 <> "import IHP.ControllerPrelude\n"
                 <> "import Generated.Types\n"
+                <> "import " <> applicationName <> ".Routes\n"
 
             viewLayoutHs =
                 "module " <> applicationName <> ".View.Layout (defaultLayout, Html) where\n"