I’m not editing a core file. You’ll notice I created my own file. A client requested a feature that does not exist in a plugin that I could find and the WordPress team seems to have no interest in adding, for whatever reason. I’m not opening it up to hackers, you’ll notice I put it in the same security logic statement stock WordPress uses to disallow malicious code from the body of the widget.
A simple google search reveals tons of topics on this site for the very same feature. You all allow it in the textarea but not the title, why?