Please add Plone 3 support

The original bug report was:

Can't remove: object has no attribute 'isDoomed'

2012-07-05T12:49:30 ERROR Zope.SiteErrorLog http://ploneclone:8080/Plone/delete-persistent-utility/delete_utility
Traceback (innermost last):
Module ZPublisher.Publish, line 119, in publish
Module ZPublisher.mapply, line 88, in mapply
Module ZPublisher.Publish, line 42, in call_object
Module wildcard.fixpersistentutilities.views, line 149, in delete_utility
Module wildcard.fixpersistentutilities.views, line 34, in undoom_transaction
AttributeError: 'module' object has no attribute 'isDoomed'

Start with the traceback in wildcard.fixpersistentutilities.views, especially lines 149 and 34, and investigate the missing isDoomed attribute during delete-utility handling. Confirm what changes are needed for Plone 3 and verify that deleting a persistent utility no longer raises this AttributeError.

Written by the indexing model from the issue text.