Confirmation email + Subscription pages

- form as an iframe: increased marginY
- fixed issue with page titles (old themes using wp_title hook)
- redirect on reinstall instead of showing a message (to avoid being able to re-save old settings)

lib/Config/Widget.php

@@ -75,8 +75,8 @@ class Widget {
         );
 
         echo $this->renderer->render('form/iframe.html', $data);
-        exit();
       }
+      exit();
     }
   }