Plone.dexterity

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Fixes:

- Sync schema when schema_policy name is changed (issue 44)
[sgeulette]

- Corrected tests on date comparison (avoid 1h shift)
[sgeulette]

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Fixes:

- No longer rely on deprecated ``bobobase_modification_time`` from
``Persistence.Persistent``.
[thet]

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- Use registry lookup for types_use_view_action_in_listings
[esteele]

- Don't check type constraints in AddForm.update() if request provides
IDeferSecurityChecks.
[alecm]

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- Avoid our own DeprecationWarning about portalTypeToSchemaName.
[maurits]

- Set title on WebDAV upload
[tomgross]

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- This version is still Plone 4.3.x compatible. Newer versions
are only Plone 5 compatible.

- Check add_permission before checking constrains. Refs 37
[jaroel]

- Remove obsolete css-class and text from statusmessages.
[pbauer]

- Complete invalidate_cache.
[adamcheasley]

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- Check allowed types for add form.
[vangheem]