Review position of the filter button in the homepage

[allyoucanmap]

Description

@offtherailz highlighted that the position of the filter button makes unclear which catalog content will be filtered, see #10731 (review):

Featured are filtered too, but here graphically it looks that filter applies only on contents. I don't is a little unclear to me, but it's opinable.

An idea could be to re-introduce a global search input centered in the page positioned before all catalogs.
This search input could contain inline button so also the filter button.
We could also differentiate this search input from the text filter input in the filter form item by listing all matching resources with infinite scroll and on click open directly the resource (in this way it will be a sort of quick search).

#10795 (review)

My only comment is about accessibility of "Favs" that is a little hidden and not so immediate, as a filter.

As a user, I expect to have a quick button to reach my favorites (anyway the same is for my own resources)

Take it as a suggestion for a futher improvemnt. Some ideas are:

a quick filter for favorites or my resources
a tab/switcher with featured, that allows to see only favorites.

We should also investigate the possibility to have quick filters to have a rapid access

Acceptance criteria

• Design and prototype a solution

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