Issue #2250315 by dawehner, pwolanin: Fixed Regression: Bring back node access optimization to menu trees.
Issue #2332295 by Berdir: Fixed Unicode requirement check not working with PHP 5.6.
Issue #2302563 by chx, dawehner: Fixed Access check Url objects.
Issue #2321393 by damiankloip, undertext: Fixed Unable to pass function name to '_content' property of the route.
Issue #2096703 by mondrake, tim.plunkett | tstoeckler: Image toolkits should use PluginFormInterface and ContainerFactoryPluginInterface.