After [1] was merged, the delete/move buttons of the snippets overlay reduced in size, because of the font-size difference between the backend and the frontend. This commit fixes it by setting a fixed font-size of 16px (this restores the same size as before, as the button was using 1rem on the frontend, and most browsers use 16px as a default font size). [1]: https://github.com/odoo/odoo/commit/31cc10b91dc7762e23b4bde9b945be0c4ce3fe3b task-2687506 Part-of: odoo/odoo#96401