Merge branch...

Merge branch '10015-move-ee-differences-for-app-assets-javascripts-boards-models-milestone-js' into 'master'

Backport of "Move EE differences for `app/assets/javascripts/boards/models/milestone.js`"

See merge request gitlab-org/gitlab-ce!27272

app/assets/javascripts/boards/models/milestone.js

-class ListMilestone {
+import { isEE } from '~/lib/utils/common_utils';
+
+export default class ListMilestone {
   constructor(obj) {
     this.id = obj.id;
     this.title = obj.title;
+
+    if (isEE) {
+      this.path = obj.path;
+      this.state = obj.state;
+      this.webUrl = obj.web_url || obj.webUrl;
+      this.description = obj.description;
+    }
   }
 }