Plone.app.controlpanel

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- Remove site control panel since it has been moved to Products.CMFPlone.
(PLIP 10359: http://dev.plone.org/ticket/10359)

- Remove site control panel since it has been moved to Products.CMFPlone.
[timo]

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- Remove search control panel since it has been moved to Products.CMFPlone.
[timo]

- Add a warning, if plone.app.event is available but timezone is not set.
[thet]

- Remove the calendar control panel, which is replaced by plone.app.event.
[davisagli]

- Adapt tests to the plonetheme.classic removal in Plone 5.
[timo]

- Remove columns in the controlpanel overview.
[esteele]

- When switching on the 'Use email address as login name' option in
the security control panel, automatically update PAS to use
lowercase login names and migrate the existing login names.
Part of PLIP 13419.
[maurits]

- Add 'Use UUID user ids' option in security control panel.
Part of PLIP 13419.
[maurits]

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- Fix test email: msgid was sent, not translation.
[thomasdesvenain]

- fix syndication settings to not write on read
[vangheem]

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- In the users listing and group membership listing, show the user's
login name instead of the user id, which is an internal identifier.
[davisagli]

- In the groups listing, don't show the group name if it is the same
as the group title.
[davisagli]

- Don't display the upgrade portal message unless the logged in user
actually has the permission to upgrade the portal. No one likes a
tease.
[eleddy]

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- Fix get_display_pub_date_in_byline when upgrading your site, refs
https://dev.plone.org/ticket/13604
[maartenkling]

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- Do not assume roles managed through the control panel include Manager.
[danjacka]