Fix comment UI on mobile

resources/comments.scss

@@ -58,6 +58,7 @@ a {
 }
 
 .comment-operation {
+    flex: auto;
     float: right;
 
     .fa {

templates/comments/media-css.html

@@ -41,6 +41,7 @@
 
         .new-comments .comment .detail .header {
             display: flex;
+            flex-wrap: wrap;
             padding: 2px 0px;
             font-weight: normal;
             border-bottom: 1px #888 solid;