Other modules disable search unaccented for number fields (for example [sale module](https://foss.heptapod.net/tryton/tryton/-/blob/c940e29284675ce479c6981e5b7f64029735da8f/modules/sale/sale.py#L275)). But this is not done on quality module. As I do not know the rational of such change I can not say if something else is missing. Just creating the issue so somebody else can fix it if needed