If you do not have favorite filters available in the mass mailing for selected model, we display empty drop down, which is not ideal. This commit improves the behavior with following changes: - If there is no filter available (for this target) and no condition set in the mailing domain, do not display anything - If mailing domain is set but there is not filter available, show a custom label "Save Filter as Favorite" save icon next to it Ent PR: https://github.com/odoo/enterprise/pull/26308 task-2711258 closes odoo/odoo#87673 Related: odoo/enterprise#26308 Signed-off-by: Warnon Aurélien (awa) <awa@odoo.com>