Dropdown editor does not respect delimiter option

Hi 👋

TL;DR; demo

It looks like the dropdown editor in Jspreadsheet CE does not support or properly handle the delimiter option.

When using a dropdown column with multiple selection enabled, changing the delimiter parameter does not affect the resulting cell value. The value is still joined using the default delimiter instead of the one provided in the configuration.

Expected behavior:

When setting a custom delimiter in the column configuration, the selected values should be joined using that delimiter.

Actual behavior:

The delimiter option has no effect. The resulting value always uses the default delimiter.

Example configuration:

{
    type: 'dropdown',
    multiple: true,
    delimiter: '|',
    source: ['A', 'B', 'C']
}

Selecting A and B still results in:

A,B

Instead of:

A|B

Jspreadsheet CE version: 5.0.4
Is this expected behavior, or is it a bug?

Thanks!

Start with the linked StackBlitz demo and reproduce the issue using a dropdown column with multiple selection and delimiter '|'. Trace the dropdown editor's value-joining behavior for the provided configuration. Done means selecting A and B produces A|B rather than A,B.