Ftw-referencewidget

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- No longer use "plone.directives.form". [mbaechtold]
- Fix an issue when loading a page with GridDataField turns out in an error [Nachtalb]

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- Fix display issue with search current path only in old chrome browsers. [mathias.leimgruber]

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- Fix searching for current path only. [mathias.leimgruber]
- Fix UniCodeDecodeError while displaying the news date. [mathias.leimgruber]

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- Add option to search in current path. [Nachtalb]
- Show localized news date in title for all news items [Nachtalb]

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- Bugfix for DataGridField support if Plone Site is inside a mount point.
[mbaechtold]

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- Add support for "collective.z3cform.datagridfield".
[mbaechtold]