**Before this commit**
Open within a dialog a popover that has a child
using the useAutofocus hook.
As the dialog has become the UI active element,
and as the popover's element tree is a sibling
of the dialog element (since both use the overlay
service): the autofocus mechanism wanted by the
popover's child does not work at all.
**After this commit**
The popovers now can also become the UI active
element, leading to the above use case to work properly.
closesodoo/odoo#140885
Signed-off-by: Florent Dardenne (dafl) <dafl@odoo.com>