Wysiwyg field: Moved add_filter functions for 'acf_the_content' outside class and into root of file to allow unhooking

Signed-off-by: Elliot Condon <e@elliotcondon.com>
JS Validation: Correctly wrapping the acf/validate_field trigger param

Signed-off-by: Elliot Condon <e@elliotcondon.com>