Respect heading ranks accessibility rule

[jepsar]

To respect this accessibility rule [1] it would be great if there would be one h1 and that pages do not start at h4.

https://primefaces.org/diamond/login.xhtml
https://primefaces.org/diamond/empty.xhtml

In the empty page, I could of course change the heading level to 1, but that doen't look that great.

[1] https://www.w3.org/WAI/tutorials/page-s ... ding-ranks

[cagatay.civici]

Thank you for the feedback, we've create an internal issue ticket to be worked on upcoming v5.0.0.