anchor.diff:        <% end %>
       <% end %>
   
  -    <% if can? :index, Spree::CustomerReturn %>
  +    <% if can? :display, Spree::CustomerReturn %>
         <% if @order.completed? %>
           <li<%== ' class="active"' if current == 'Customer Returns' %>>
             <%= link_to_with_icon 'download', Spree.t(:customer_returns), admin_order_customer_returns_url(@order) %>
  
positive.code:       </li>
      <% end %>
  
      <% if can? :index, Spree::ReturnAuthorization %>
        <% if @order.completed? %>
          <li<%== ' class="active"' if current == 'Return Authorizations' %> data-hook='admin_order_tabs_return_authorizations'>
            <%= link_to_with_icon 'share', Spree.t(:return_authorizations), admin_order_return_authorizations_url(@order) %>
  
negative.code: <nav class="menu">
    <ul data-hook="admin_order_tabs">
      <% if (@order.shipments.count == 0 || @order.shipped_shipments.count == 0) %>
        <li<%== ' class="active"' if current == 'Cart' %> data-hook='admin_order_tabs_order_details'>
          <%= link_to_with_icon 'shopping-cart', Spree.t(:cart), cart_admin_order_url(@order) %>
        </li>
  