revert to use sync

TODO: this is deprecated and should be updated using next was causing timeline to show on first load.

common/header.html

@@ -224,7 +224,7 @@ I18n.translations[I18n.currentLocale()].js.composer.contains_dtoc = I18n.t(
   });
 })(() => {});
 $.fn.dtoc = $elem => {
-  run.next(() => {
+  run.scheduleOnce("sync", () => {
     if ($elem.hasClass("d-editor-preview")) return;
     if (!$elem.parents("article#post_1").length) return;
     const dToc = $elem.find(`[data-theme-toc="true"]`);