ComponentLookupError with yafowil.plone

calling ++addimmediate++ on a ContentType using a behavior composed by yafowil.plone, throws this error no matter, the immediatecreate-behavior is upon this content type or not.

```code
Traceback (innermost last):
Module ZServer.ZPublisher.Publish, line 144, in publish
Module ZPublisher.mapply, line 85, in mapply
Module ZServer.ZPublisher.Publish, line 44, in call_object
Module plone.z3cform.layout, line 63, in __call__
Module plone.z3cform.layout, line 47, in update
Module collective.immediatecreate.editing, line 85, in update
Module plone.z3cform.fieldsets.extensible, line 65, in update
Module plone.z3cform.patch, line 30, in GroupForm_update
Module z3c.form.group, line 132, in update
Module z3c.form.form, line 136, in updateWidgets
Module z3c.form.field, line 257, in update
Module zope.component._api, line 95, in getMultiAdapter
Module zope.component._api, line 108, in queryMultiAdapter
Module zope.interface.registry, line 359, in queryMultiAdapter
Module zope.interface.adapter, line 552, in queryMultiAdapter
Module z3c.form.browser.orderedselect, line 90, in SequenceSelectFieldWidget
Module zope.component._api, line 97, in getMultiAdapter
ComponentLookupError: ((, None, ), , u'')
```

Start at collective.immediatecreate.editing line 85 and reproduce the ++addimmediate++ request on a content type using yafowil.plone. Trace the form update into z3c.form's SequenceSelectFieldWidget and the reported component lookup. Done means the immediate-create form updates without ComponentLookupError for content types both with and without the immediatecreate behavior.

Written by the indexing model from the issue text.