Before this commit, an empty many2one field in readonly rendered an empty `<a href"...">` node. Even though that link was no visible, it had a non null width, and was thus clickable (the cursor changed when hovering it). When clicked, it opened the form view of the comodel, in create mode. This commit fixes the issue by not rendering anything if the value is false. closes odoo/odoo#100158 Signed-off-by: Géry Debongnie <ged@odoo.com>