Improve the design of SO/PO/INV mails together with the other changes of the release, i.e. fixes a few imprecisions introduced by odoo/odoo#82167. In particular, these changes enforce * a responsive, mobile friendly layout tested on many devices and OS * more generally, a consistent styling. Note that some redundancy in directives is required for compatibility across email clients. Translation files are included. Task-2751139 Follow-up of Task-2712450 See odoo/enterprise#25154 closes odoo/odoo#86494 X-original-commit: 4914127b428802d2ff2e15351238a3ffef24b9cc Related: odoo/enterprise#25306 Signed-off-by: Thibault Delavallee (tde) <tde@openerp.com>