Fixes #6918 Add proper HTTP status code (302 moved temporarily) to Url:redirect()

core/Url.php

@@ -471,6 +471,7 @@ class Url
         if (UrlHelper::isLookLikeUrl($url)
             || strpos($url, 'index.php') === 0
         ) {
+            Common::sendResponseCode(302);
             Common::sendHeader("Location: $url");
         } else {
             echo "Invalid URL to redirect to.";