Grokui.admin

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- Use the correct IApplication interface definition.

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- In testing the security notifications, start a server instead of using
file://localhost URLs. This saves a lot of urlopen troubles across
platforms.

- Test setup cleanup.

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- Fix tests in Windows.

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* Fix a bug in the test setup where zope.session was not configurred.

* Fix https://bugs.launchpad.net/grok/+bug/638763
We don't hide away Duplication/KeyErrors that are raised during
application creation any more.

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* The application creation view now uses the Grok util function
`create_application`. Therefore, the `ApplicationInitializedEvent`,
recently introduced in Grok, is now triggered while an application is
created and persisted. This is an important event, allowing to hook
handlers that need local utilities and catalog indexes that are not
yet present at the ObjectCreatedEvent stage.

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* Modified package to comply with Zope Foundation policy.

* Removed duplicated/unused code.
Fix https://bugs.launchpad.net/grok/+bug/539940

* Reflect changes in Folder API: check also for KeyError, not only for
DuplicationError when adding new apps.

* Added extra-templatedirs and moved templates into these in order to
avoid (erraneous) templatedir-registry warnings.