Plone.base

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New features:


- enable Plugin 'accordion' for TinyMCE 1letter (62)
- Add a field ``webstats_head_js`` to the Site controlpanel and render its
contents in the head section using ``IHtmlHeadLinks`` viewlet manager.
See `issue 3931 <https://github.com/plone/Products.CMFPlone/issues/3931>`_:
some javascript needs to be loaded at the bottom of the page, and some in the head section.
[jladage] (3931)

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New features:


- Make the TinyMCE help plugin available as an option [rber474] (41)

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Bug fixes:


- Fix TinyMCE format icon names.
[petschki] (3905)


Internal:


- Update configuration files.
[plone devs] (6e36bcc4)

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New features:


- Move interface INameFromTitle from `plone.app.content` here.
This helps avoiding a circular dependency between `plone.app.dexterity`
and `plone.app.content`.
[gforcada] (3858)

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Bug fixes:


- Remove action property `modal` default value.
Fixes: https://github.com/plone/Products.CMFPlone/issues/3801
[petschki] (3801)


Internal:


- Update configuration files.
[plone devs] (1a7a3da3)

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Bug fixes:


- Move test for navigationroot from plone.app.layout and refactor.
[jensens] (move-navroot-test)