Plone.app.locales

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- Update Italian translations
[lelit]

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- Minor fix in German translation.
[jensens]

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- For French and Catalan, fix mailtemplate_username_info translation that
triggered an error when sending the mail.
This fixes https://github.com/collective/plone.app.locales/issues/311
[vincentfretin]

- Update Spanish and Basque translations.
[erral]

- Remove use of html tag in info_empty_dashboard.
This fixes https://github.com/plone/Products.CMFPlone/issues/3128
[vincentfretin]

- Update Norwegian translations.
[espenmn]

- Fix French date and hours format for the pickadate widget.
[vincentfretin]

- Update german wording and be polite.
[ksuess]

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- Update French, German, Spanish, Basque translations.

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- Update Italian translations
[ale-rt, arsenico13, cekk, pnicolli]

- Complete Spanish translation for widgets.po
[erral]

- Basque translations for widgets.po
[erral]

- Fix typos in French translations.
[laulaz]

- Fixed possible package install error with Python 3.6 when no system locale is set.
See `coredev issue 642 <https://github.com/plone/buildout.coredev/issues/642#issuecomment-597008272>`_.
[maurits]

- German translations for widgets.po.
- Synchronize with latest mockup.
- Structure pattern: Change message from misleading "Cannot order items while querying" to "Drag and drop reordering is disabled while filters are applied.".
Fixes: https://github.com/collective/plone.app.locales/issues/173
[thet]

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- Megaupdate plone.po RU locale.
[Serge73]