edit.html.erb in spree_backend-2.2.2

- old
+ new

@@ -4,10 +4,10 @@
   <%= Spree.t(:editing_shipping_method) %>
 <% end %>
 
 <% content_for :page_actions do %>
   <li>
-    <%= button_link_to Spree.t(:back_to_shipping_methods_list), spree.admin_shipping_methods_path, :icon => 'icon-arrow-left' %>
+    <%= button_link_to Spree.t(:back_to_shipping_methods_list), spree.admin_shipping_methods_path, :icon => 'arrow-left' %>
   </li>
 <% end %>
 
 <div data-hook="admin_shipping_method_edit_form_header">
   <%= render :partial => 'spree/shared/error_messages', :locals => { :target => @shipping_method } %>