Accessibility improvements required for Nutri-Score KP

[g123k]

Hi everyone,

Screen readers first read the headings (negative and positive points) before the rest of the content.
The arrow in front of the text is also read (unnecessary).

Improvements:

• Merge the back button and the title
• Instead of just "NutriScore xxx" for the title, we should say "NutriScore XXX for [name of the product]"

a11n.mp4

[g123k]

Closed by #5290