FormCategoryInput does not allow you to remove values

I think there is some incompatibility with the text input version of this component in formik, if you remove a value form the input, formik completely deletes the data field instead of setting it empty(see `item_class` in the screenshot). 😱


Update: needs to support the `nullable` prop

Start by locating the FormCategoryInput component and its Formik integration, then reproduce removing a value from the input. Check how the field value changes, including when the nullable prop is used; done means removing a value preserves the data field with the expected empty or null value.

Written by the indexing model from the issue text.