message: Better error message and annotations if line graph has a single query.
diff: @@ -92,8 +92,15 @@ export class Line extends BaseGraph {
  }
  updateGraph (data) {
  + let queries = this.props.query;
  + if (!_.isArray(queries)) {
  + queries = [{
  + query: queries,
  + name: this.props.title,
  + }];
  + }
  _.each(data, (result, i) => {
  - const query = this.props.query[i];
  + const query = queries[i];
  const name = query && query.name;
  if (result.data.result.length === 0) {
  // eslint-disable-next-line no-console
  