exempt submission and leaderboard widgets from X-Frame-Options

Fix the following issue:

#3305 - Leaderboard widget "refuse to connect"</a></li> <li>add clickjacking decorator <code>xframe_options_exempt</code> to the leaderboard and submission widget</li> </ul> </div> </div> <div class="comment"> <div class="user"> <a rel="noreferrer nofollow" target="_blank" href="https://github.com/IceCreamWW"><img src="https://avatars.githubusercontent.com/u/20967938?v=4" />IceCreamWW</a> commented <strong> 5 months ago</strong> </div> <div class="markdown-body"> <p>Hi, @Didayolo Di, I've noticed you asking for a fix for #3305. I was hosting a competition and encountered the same problem. Could you please review and merge this PR?</p> </div> </div> <div class="comment"> <div class="user"> <a rel="noreferrer nofollow" target="_blank" href="https://github.com/Didayolo"><img src="https://avatars.githubusercontent.com/u/11784999?v=4" />Didayolo</a> commented <strong> 5 months ago</strong> </div> <div class="markdown-body"> <p>Hi @IceCreamWW, thank you very much for your contribution. I'll review it as soon as possible.</p> </div> </div> <div class="page-bar-simple"> </div> <div class="footer"> <ul class="body"> <li>© <script> document.write(new Date().getFullYear()) </script> Githubissues.</li> <li>Githubissues is a development platform for aggregating issues.</li> </ul> </div> <script src="https://cdn.jsdelivr.net/npm/jquery@3.5.1/dist/jquery.min.js"></script> <script src="/githubissues/assets/js.js"></script> <script src="/githubissues/assets/markdown.js"></script> <script src="https://cdn.jsdelivr.net/gh/highlightjs/cdn-release@11.4.0/build/highlight.min.js"></script> <script src="https://cdn.jsdelivr.net/gh/highlightjs/cdn-release@11.4.0/build/languages/go.min.js"></script> <script> hljs.highlightAll(); </script> </body> </html>

codalab / codalab-competitions

exempt submission and leaderboard widgets from X-Frame-Options #3498