overwrite polygon default help text
overwrite polygon default help text

the default help text is "enter valid JSON". It can not be blank (see https://github.com/dmkoch/django-jsonfield/issues/95)

see also https://github.com/liqd/a4-meinberlin/issues/503

liqd/adhocracy4,liqd/adhocracy4,liqd/adhocracy4,liqd/adhocracy4