Fixed: layout.file is saved when the design is created

app/views/admin/designs/_form.html.erb

@@ -18,7 +18,10 @@
 <p>
 <%= f.label "layout", t('admin.layout') %>
 <%  if @design.layout.blank? %>
-    <%= f.file_field :layout %>
+		<%= fields_for 'design[layout]' do |f| %>
+		  <%= f.file_field :file %>
+			<%= f.hidden_field :to_save, :value => true %>
+		<% end %>
   <% else%>
     <%= File.basename (@design.layout.file.url)  %>
 <% end %>