Option to use disabled attribute instead of class

Hello!

I'm curious if it would be possible to have an option to add the disabled attribute rather than a disabled class. Reason being, you can easily key styles off of the disabled attribute, but it also comes with the benefit of better accessibility when you use the attribute.

Thoughts?

Look for where jPList adds the 'disabled' class to HTML elements, likely in the core library files. Check if there's a configuration option for attributes. The change involves modifying the logic to optionally set a 'disabled' attribute instead of or in addition to the class. Test by applying the library to a sample HTML structure and verifying the attribute appears.

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