Expose user's settings and defaults inline

This improves performance by removing two AJAX calls and a lot of
JavaScript promises.

UI/PreferencesUI/product.plist

@@ -33,12 +33,12 @@
         };
         jsonDefaults = {
           protectedBy = "View";
-          actionClass = "UIxJSONPreferences";
+          pageName = "UIxJSONPreferences";
           actionName = "jsonDefaults";
         };
         jsonSettings = {
           protectedBy = "View";
-          actionClass = "UIxJSONPreferences";
+          pageName = "UIxJSONPreferences";
           actionName = "jsonSettings";
         };
         save = {