add class to enabel to apply below classes

src/server/views/layout-growi/widget/comments.html

@@ -1,4 +1,4 @@
-<div class="page-comments-row row hidden-print">
+<div class="main-container page-comments-row row hidden-print">
 
   <div class="page-comments col-lg-7 col-md-9">