Purpose:
When a list view with searchpanel is empty, the searchpanel is completely
empty and white, and it's unclear what it's for. Make it obvious by
displaying an empty state. This will typically happen in some views when
you have no data or don't have the groups needed to show filters.
Spec:
Display the following paragraphs with the bs classes "small" and "text-muted":
"No quick filter available."
"Update the filters in the search bar to display more records."
"Quick filters will become available if the records shown can be filtered."
closesodoo/odoo#107379
Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>