use capture instead of layout-hack to allow deface overrides

app/views/admin/ordergroups/_form.html.haml

@@ -1,12 +1,13 @@
 - unless @ordergroup.new_record?
   %p= t('.first_paragraph', url: link_to(t('.here'), new_invite_path(id: @ordergroup.id), remote: true)).html_safe
 = simple_form_for [:admin, @ordergroup] do |f|
-  = render :layout => 'shared/group_form_fields', :locals => {:f => f} do
+  - captured = capture do
     = f.input :contact_person
     = f.input :contact_phone
     = f.input :contact_address
     - if FoodsoftConfig[:use_apple_points]
       = f.input :ignore_apple_restriction, :label => false, :inline_label => true
+  = render 'shared/group_form_fields', f: f, captured: captured
   .form-actions
     = f.button :submit
     = link_to t('ui.or_cancel'), :back