Resolve iframe framing issues (#3753)

Author: tunetheweb

src/static/js/almanac.js

@@ -426,6 +426,8 @@ function upgradeInteractiveFigures() {
           iframe.setAttribute('scrolling', fig_img.dataset.scrolling || 'no');
           iframe.setAttribute('loading', fig_img.dataset.loading || 'lazy');
           iframe.setAttribute('src', fig_img.dataset.iframe);
+          // Set it to credentialless to avoid issues when it tries to embed the login screen
+          iframe.setAttribute('credentialless', true);
 
           //The figure should have a link
           var parentLink = fig_img.parentNode;