app/views/admin/tracks/index.html.erb
<div class="subpage">
<%= content_tag :div, class: 'button-field' do %>
<%= link_to 'Add new track', new_admin_track_path, class: 'button', remote: true %>
<% end %>
<%= render_admin_track_list(@tracks) %>
<%= render_pagination(@tracks) %>
</div>