feat(post): add 'loading comments' indicator

src/components/post-desktop/post-desktop.tsx

@@ -410,6 +410,11 @@ const PostDesktop = ({ openReplyModal, post, roles, showAllReplies, showReplies
             )}
           </span>
         )}
+        {replyCount === undefined && (
+          <span className={styles.loadingString}>
+            <LoadingEllipsis string={t('loading_comments')} />
+          </span>
+        )}
         {!isHidden &&
           !(pinned && !isInPostPageView && !showOmittedReplies[cid]) &&
           !isInPendingPostView &&