Halved padding for emoji (#2344)

app/assets/stylesheets/components.scss

@@ -2070,7 +2070,7 @@ button.icon-button.active i.fa-retweet {
 
     .emoji {
       display: inline-block;
-      padding: 5px;
+      padding: 2.5px;
       border-radius: 4px;
     }
   }