Select Filters with Filter Panel plus default "#"

Hi all,

I have a Problem with the filter panel in Design Studio:

I want so select the filter values with the filter panel, but in any selection I want to add the default value for for -> not assigned #.

For Example -> Filter on Country:

When I choose Germany and USA, I want to set the following filter automatically:

Germany

USA

#

Has anyone an idea to do this?

Thanks in advance

Thorsten