restore hackmd

src/client/js/legacy/crowi.js

@@ -290,6 +290,9 @@ window.addEventListener('hashchange', (e) => {
     if (window.location.hash === '#edit') {
       $('a[href="#edit"]').tab('show');
     }
+    else if (window.location.hash === '#hackmd') {
+      $('a[href="#hackmd"]').tab('show');
+    }
   }
   else {
     $('a[href="#revision-body"]').tab('show');