remove tabindex

src/components/Article.vue

@@ -16,8 +16,8 @@
             <DefElement v-for="(element, index) in article.body.etymology" :dictionary="dictionary" :key="index" :body='element' @article-click="article_link_click" />
           </ul>
       </section>
-      <section class="definitions" v-if="has_content" tabindex="0">
-        <h3 tabindex="0">{{def_label}}</h3>
+      <section class="definitions" v-if="has_content">
+        <h3>{{def_label}}</h3>
         <ol>
           <Definition v-for="definition in article.body.definitions" :dictionary="dictionary" :level="1" :key="definition.id" :body='definition' @article-click="article_link_click" />
         </ol>