utilize button classes on preferred auth button

[rails.git] / app / views / application / _sidebar_header.html.erb

<div class="d-flex">
  <h2 class="flex-grow-1 text-break"><%= title %></h2>
  <div>
    <button type="button" class="btn-close" aria-label="<%= t("javascripts.close") %>"></button>
  </div>
</div>