Merge branch 'lm-replace-underscore-lodash-issues-show' into 'master'

Removes underscore from issues_show

See merge request gitlab-org/gitlab!25562

app/assets/javascripts/issue_show/stores/index.js

-import _ from 'underscore';
 import { convertObjectPropsToCamelCase } from '~/lib/utils/common_utils';
 import updateDescription from '../utils/update_description';
 
@@ -26,7 +25,7 @@ export default class Store {
       '.detail-page-description.content-block',
     );
     const details =
-      !_.isNull(descriptionSection) && descriptionSection.getElementsByTagName('details');
+      descriptionSection != null && descriptionSection.getElementsByTagName('details');
 
     this.state.descriptionHtml = updateDescription(data.description, details);
     this.state.titleHtml = data.title;

app/assets/javascripts/issue_show/utils/update_description.js

-import _ from 'underscore';
-
 /**
  * Function that replaces the open attribute for the <details> element.
  *
@@ -10,7 +8,7 @@ import _ from 'underscore';
 const updateDescription = (descriptionHtml = '', details) => {
   let detailNodes = details;
 
-  if (_.isEmpty(details)) {
+  if (!details.length) {
     detailNodes = [];
   }