Allow links that are target=_blank to opt-out from the icon

assets/js/external_links.js

@@ -2,7 +2,9 @@ import feather from "feather-icons";
 
 document.addEventListener('DOMContentLoaded', () => {
     document.querySelectorAll('a[target="_blank"]').forEach(el => {
+        if (!el.classList.contains('no-icon')) {
             el.innerHTML += `<i data-feather="external-link"></i>`;
+        }
     });
 
     feather.replace();