Rewrite and restyle reaction selector and enable no-sizzle eslint rule (#30453)

Enable `no-sizzle` lint rule, there was only one use in `initCompReactionSelector` and:

- Remove all jQuery except the necessary fomantic dropdown init
- Remove the recursion, instead bind event listeners to common parent container nodes

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Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
Co-authored-by: Giteabot <teabot@gitea.io>

web_src/css/modules/comment.css

@@ -16,7 +16,7 @@
 .ui.comments .comment {
   position: relative;
   background: none;
-  margin: 0.5em 0 0;
+  margin: 3px 0 0;
   padding: 0.5em 0 0;
   border: none;
   border-top: none;