fix issue #299 - display filters when no product was found

[aldomonteiro]

I want to merge this change because...

Fixes #299

Screenshots

With this correction, when the filters don't match any product, the filters keep open and the user can correct it. The change affects 2 pages:

1. The "Search" page:
   

2. The "Categories" page:
   

Pull Request Checklist

1. [N/A] All visible strings are translated with proper context.
2. [N/A] All data-formatting is locale-aware (dates, numbers, and so on).
3. The changes are tested.
4. [X ] The code is documented (docstrings, project documentation).
5. Changes are mentioned in the changelog.

[piotrgrundas]

I think the style was correct. Use prettier in vscode with default settings.

[AlicjaSzu]

ProductFilters and ProductsList can be wrapped in one condition:

{canDisplayProducts && ( <> <ProductFilters /> <ProductsList /> </> )}

[salwator]

@aldomonteiro could you please check this PR and apply changes needed?

[aldomonteiro]

@aldomonteiro could you please check this PR and apply changes needed?

Done!

[bogdal]

Great work @aldomonteiro 👍