choice.select=false disable the select for a optional choice with form.maybenull=true. This option supports editing filled instances without changing selection but does not allow to select an initial value..
choice.select=false disable the select for a optional choice. This option supports empty and filled instances. Note how when a value is created the select disappears until the value is removed.
choice.select=false disable the select for a choice. This option is for filled instances only, so the existing (required) choice becomes fixed but cannot be used to insert an initial value