[IMP] mail,tools: clean tags to kill list in HTML sanitizer
[IMP] mail,tools: clean tags to kill list in HTML sanitizer

Some tags are not necessary in the HTML template and we can remove them to
have a proper HTML output.

Task 2171753

closes odoo/odoo#51757

Signed-off-by: Thibault Delavallee (tde) <2d325771bb6e8870d87f0f3f7b45589a8338e550@openerp.com>

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo