H5P.com accessibility improvements

Many accessibility improvements released on H5P.com December 2022…

Multiple Choice: Feedback after show solution / check (HFP-3554)
True/False: Fix too low color ratio for focus effect on radio buttons
Dialog cards: Fix aria-live being hidden
Interactive Book: Improve a11y for hamburger menu (HFP-3598)
Fix unresponsive attemptsbar
Fix contrast ratio on focus effect on submit button on popups
Course Presentation:
Fix contrast for circles and star in navigation bar. Also fix contrast for focus effect on footer buttons (HFP-3533)
Accessible tooltip (HFP-3548)
Add Outline to focused wrapper (HFP-3544)
Using correct aria attributes for carousel (HFP-3547)
Missing accessible name for elements (HFP-3556)
Enable screen reader browse mode (HFP-3577)
Fix accessibility issues for popups (HFP-3586/3573)
Move navigation bar above slides in taborder (HFP-3583)