Added datepicker_use_button option
Added datepicker_use_button option

Note that the new option does not use the dp_ prefix since it's not a datepicker javascript option. It is used in the Twig template to control the HTML, which then controls whether a button is used for the datepicker or not.
sonata-project/SonataCoreBundle,sonata-project/SonataCoreBundle,sonata-project/SonataCoreBundle,sonata-project/SonataCoreBundle