Remove "report a problem" entry in product navigation for producers platform

[alexgarel]

Problem

On producer platform, we display the "report a problem" entry in product nav bar, while there is no corresponding knowledge panel, as it makes no sense (this is not public data).

Proposed solution

Remove the entry in the menu if the knowledge panel is not there.

[subi9]

@alexgarel Can you please suggest some products/links where "report a problem" knowledge panel is not present. I have checked some products where knowledge panel as well as the menu is present.

[stephanegigandet]

@subi9 This is on the producers platform (pro platform). https://github.com/openfoodfacts/openfoodfacts-server/blob/main/docs/dev/how-to-develop-producer-platform.md

[teolemon]

It happens for 100% of products, it's a partly implemented feature, we should have removed the top button when we removed the panel.
The location is here @subi9 : https://github.com/openfoodfacts/openfoodfacts-server/blob/main/templates/web/pages/product/product_page.tt.html#L93