When searching a text of a hidden field (for example, "gate"), the
setting itself will not be shown, but the group title, and the app
Search Header will be shown.
This issue arise because, we use an if condition with all the label of
all the fields (hidden or not) in the group (or app) to decide if the
group title or the app header will be showed.
Now, we modify this to hide (d-none) the group title or the app header
if there is not a settings below them.
Part-of: odoo/odoo#99205
Jorge Pinna Puissant
129bb263f0