missing form section

--HG--
branch : stable

views/__init__.py

 from cubicweb.web import uicfg
 
 uicfg.primaryview_section.tag_object_of(('Email', 'in_thread', 'EmailThread'), 'hidden')
-uicfg.autoform_section.tag_subject_of(('*', 'generated_by', 'Email'), 'hidden')
+uicfg.autoform_section.tag_subject_of(('*', 'generated_by', 'Email'), 'main', 'hidden')