Plip10359 - move security controlpanel from plone.app.controlpanel

Moved the security control panel from plone.app.controlpanel, replaced portal_properties lookups with plone.app.registry lookups and added robot tests.

Note that robot tests cover only the basic functionality, more thorough tests were moved from plone.app.controlpanel to plone.app.users, see https://github.com/plone/plone.app.users/pull/22 for more info.

There is still one robot test missing, for the ``allow_anon_views_about```setting, because the author information hasn't been properly integrated into the theme yet.