message: fix custom filters doc
diff: @@ -21,14 +21,17 @@ class CustomFilter {
  return "CustomFilter"
  }
  - // returns the ES query
  + // returns the ES query. Requires to return a boolean query
  + // https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl-bool-query.html
  getFilters(filters) {
  return {
  - "should" : filters.map((filter) => {
  + "bool": {
  + "filter" : filters.map((filter) => {
  return { "term" : {"tag": filter.value }}
  })
  }
  }
  + }
  // powers the appliedFilters type for all filters added
  getSelectedFilter(filterSet) {
  