Bug fixes

Update css extension for font awesome.

changes from last year ; fix for html5-attributes of iframe, supporting allow fullscrenn

Fixed issue #3136664 by FatherShawn: Cannot set default field values (e.g. url, title, width, or height)

Fixed issue #3136664 by FatherShawn: Cannot set default field values (e.g. url, title, width, or height)

Drupal 9 compatibility.