Input field that let the user select a date in date picker with a click.
array(
'id' => 'date_1',
'type' => 'date',
'title' => 'Date ISO', // optional
'format' => 'yy-mm-dd',
'class' => 'your-class', // optional
'wrap_class' => 'wrap-class', // optional
'prepend' => 'fa-calendar', // optional
'picker' => 'html5', // optional, display native HTML5 date picker
),