Plone.app.controlpanel

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- Remove the syndication control panel (moved to Products.CMFPlone).
[timo]

- Remove the quickinstaller (moved to Products.CMFPlone).
[timo]

- Remove the users/groups control panel (moved to Products.CMFPlone).
[timo]

- Remove the navigation control panel (moved to Products.CMFPlone).
[timo]

- Remove the markup control panel, as it was moved to Products.CMFPlone.
[thet]

- Remove the control panel overview (moved to Products.CMFPlone)
This breaks Plone 4 compatibility.
PLIP 10359 (https://dev.plone.org/ticket/10359)
https://github.com/plone/Products.CMFPlone/issues/290
[khink]

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- Nothing changed yet.

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- Remove DL's from portal message templates.
https://github.com/plone/Products.CMFPlone/issues/153
[khink]

- Allow ``text-decoration`` in TinyMCE
see https://github.com/plone/plone.app.controlpanel/pull/18
[jnachtigall]

- Integration of the new markup update and CSS for both Plone and Barceloneta
theme. This is the work done in the GSOC Barceloneta theme project.
[albertcasado, sneridagh]

- Update <div id="content"> in all templates with <article id="content">
[albertcasado]

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- prevent error when missing popupforms.js or
plone.app.jquerytools.overlays.css
[tkimnguyen]

- Be able to disable safe html transform from control panel
[vangheem]

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- Changed timezone setting check to work with controlpanel consolidation
effort of Plone 5.
[thet]

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- add quickinstaller control panel
[vangheem]