Since [this other commit], we use classes to change the font size of text. Unfortunately, we forgot to make them responsive. This commit fixes that. [this other commit]: https://github.com/odoo/odoo/commit/194f73a9bbad8c3c3fb5c378e7bdfa704aaacdc0 task-3615976 closes odoo/odoo#144047 Signed-off-by: Quentin Smetz (qsm) <qsm@odoo.com>