Plone.app.portlets

------------------

New features:

- Make use of plone.namedfile's tag() function to generate image tags.
Part of plip 1483.
[didrix]

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Bug fixes:

- fixed css-classes for thumb scales ...
https://github.com/plone/Products.CMFPlone/issues/2077
[fgrcon]

- Fix regression where navigation portlet ignored unlimited setting for
*Navigation tree depth* setting
[datakurre]

- Make sure, that ``utils.assignment_mapping_from_key`` traverses only to non-unicode paths.
OFS.traversable doesn't accept unicode paths.
[thet]

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Bug fixes:

- Put ellipsis out of the title_switch_portlet_managers (Other portlet
managers) message.
[vincentfretin]

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Bug fixes:

- Added ``referer`` property to ``PortletAdding`` view. Now all views
like this have it. [maurits]

- Apply security hotfix 20160830 for redirects. [maurits]

- Add coding header on python files.
[gforcada]

----------------

New features:

- Add category as CSS class to actions portlet for easier styling
[tomgross]

- Upgrade news portlet to use the new select widget;
Add dependency on plone.app.z3cform
[datakurre]

- Tracebak info on importing ``portlets.xml`` to show better error location in the xml
[SyZn]

Bug fixes:

- Use zope.interface decorator.
[gforcada]

- Change ``plone-manage-portlets`` to use Patternslib base pattern ``pat-base``.
[thet]

- Use absolute source URL in navigation portlet's thumbnails
[davilima6]

------------------

Bug fixes:

- Fixed missing pat-livesearch on search portlet
[agitator]

- Remove Plone 3 compatibility code
[tomgross]