message: fix(filterbox): fixed  runtime exception in filterbox for allow multiple selection is false
diff: @@ -840,7 +840,7 @@ def merge_extra_filters(form_data: dict):
  if date_options.get(filtr['col']):
  if filtr.get('val'):
  form_data[date_options[filtr['col']]] = filtr['val']
  - elif filtr['val'] and len(filtr['val']):
  + elif filtr['val']:
  # Merge column filters
  filter_key = get_filter_key(filtr)
  if filter_key in existing_filters:
  