fix(pci.projects.sidebar): add external icon for horizon (#802)

ref: MANAGER-2768

Author: marie-j

packages/manager/modules/pci/src/projects/project/sidebar/sidebar.html

@@ -38,11 +38,12 @@ <h2 class="mb-0 d-inline-block" style="font-weight: 400;" data-ng-bind="$ctrl.pr
                                     </a>
                                     <a
                                         data-ng-if="subitem.options.url"
-                                        class="oui-sidebar-link"
+                                        class="oui-sidebar-link oui-link_icon d-flex align-items-center"
                                         data-ng-href="{{:: subitem.options.url[$ctrl.REGION] }}"
                                         data-ng-click="$ctrl.onMenuItemClick(subitem)"
                                         target="{{:: subitem.options.target }}">
                                         <span class="item-title" data-translate="{{:: subitem.translation }}"></span>
+                                        <span class="oui-icon oui-icon-external_link" aria-hidden="true"></span>
                                     </a>
                                 </li>
                             </ul>