Before this commit: When the label of the selected value was too long, the SelectMenu width would grow indefinitely to accomodate, this behaviour was causing some layouts to break. After this commit: The width of the SelectMenu is still automatic and will try to fill its parent but will not make it grow. Instead, if the label is too long and does not fit in the parent, it will be truncated. Solution: Using a grid display we can easly set the label to auto and truncate it while keeping a constant size for the icons. closes odoo/odoo#115799 Related: odoo/enterprise#37285 Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>