Allow to define how many values can be selected in a dropdown column

Hi there,

it would be really nice if I were able to limit how many values in a dropdown column someone is able to assign to an entry e.g. no more than 1, no more than 2, etc.

Right now there doesn’t appear to be a way to limit for someone to assign as many values as they want. This also causes issues with forms where I’d like someone to pick exactly one value from a lenghty dropdown list.