With current implementation, when passing notifier_list="Mail Message",
the same email is sent len("Mail Message") times.

Prevent getAvailablePropertySheetList and getAvailableConstraintList from returning internal attributes such as _lock and _factory

As zope prevents from creating objects starting with _, we can filter out
attributes whose names starts with "_"

Signed-off-by: Aurélien Calonne <aurel@nexedi.com>

It would be a link to the domain, category or temp domain, which is useless for
end users.
Signed-off-by: Aurélien Calonne <aurel@nexedi.com>

Signed-off-by: Aurélien Calonne <aurel@nexedi.com>

The class is named listbox-table-summary-cell
Signed-off-by: Aurélien Calonne <aurel@nexedi.com>

Without this, each call to getContentType modifies and reindex the object

 With this change, by using "None" instead username at any SecurityTestCase
 assertion, it test security as Anonymous. ie.:
   self.failIfUserCanViewDocument(None, document)

Else it is not possible to use newContent with temporary portal types.

If it is not imported, then it won't appear