--- a/src/pyams_content/shared/site/zmi/link.py	Mon Mar 18 17:44:39 2019 +0100
+++ b/src/pyams_content/shared/site/zmi/link.py	Mon Mar 18 17:46:06 2019 +0100
@@ -9,16 +9,13 @@
 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
 # FOR A PARTICULAR PURPOSE.
 #
-from z3c.form.browser.checkbox import SingleCheckBoxFieldWidget
-
-from pyams_form.group import NamedWidgetsGroup
-
 
 __docformat__ = 'restructuredtext'
 
 from uuid import uuid4
 
 from z3c.form import field
+from z3c.form.browser.checkbox import SingleCheckBoxFieldWidget
 from zope.interface import Interface, implementer
 from zope.intid.interfaces import IIntIds
 from zope.schema import Int
@@ -30,6 +27,7 @@
 from pyams_content.shared.site.zmi.widget import SiteManagerFoldersSelectorFieldWidget
 from pyams_content.zmi.interfaces import ISiteTreeTable
 from pyams_form.form import AJAXAddForm, ajax_config
+from pyams_form.group import NamedWidgetsGroup
 from pyams_i18n.interfaces import II18n
 from pyams_pagelet.pagelet import pagelet_config
 from pyams_skin.interfaces.container import ITableElementName