Produce valid html

[deining]

Check of anatole demo with W3C validation service:

Two errors are reported:

• No p element in scope but a p end tag seen.
• An input element with a type attribute whose value is hidden must not have any aria-* attributes.

Were great if those errors (and maybe also the warnings) could be fixed.

[lxndrblz]

@deining Thanks for your report. I'll need to investigate that a bit further, but it should generally be an easy fix.