The editor's toolbar is at the very bottom of mass_mailing's sidebar, making dropdowns pretty awkward as they often require the user to scroll down to see them. This extends the editor's toolbar for mass_mailing so all dropdowns become dropups instead. closes odoo/odoo#102734 X-original-commit: d4b5527113a6092063cba3409d870c5c45a8cd03 Signed-off-by: David Monjoie (dmo) <dmo@odoo.com>