code: function _updatePicker() {
          var filter = getActiveFilter();
          if (filter && filter.patterns.length) {
              var label = filter.name || _getCondensedForm(filter.patterns);
              _picker.setButtonLabel(StringUtils.format(Strings.EXCLUDE_FILE_FILTER, label));
          } else {
              _picker.setButtonLabel(Strings.NO_FILE_FILTER);
          }
      }
docs: Update the picker button label with the name/patterns of the selected filter or
  No Files Excluded if no filter is selected.