_form.html.erb in blacklight-spotlight-4.0.0

- old
+ new

@@ -1,9 +1,9 @@
 <%= bootstrap_form_for([spotlight, current_exhibit, @resource.becomes(Spotlight::Resources::IiifHarvester)], as: :resource, layout: :horizontal, label_col: 'col-md-2', control_col: 'col-sm-6 col-md-6' ) do |f| %>
   <%= f.text_field :url, help: t('.url-field.help'), label: t('.manifest') %>
   <div class="form-actions">
     <div class="primary-actions">
-      <%= cancel_link @resource, :back, class: 'btn-sizing' %>
+      <%= cancel_link @resource, :back, class: 'btn btn-link', role: 'button' %>
       <%= f.submit t('.add_item'), class: 'btn btn-primary' %>
     </div>
   </div>
 <% end %>