feat: add missing clickaway directives (#9451)

* feat: add onClickaway to widget

* feat: add clickaway to portal

* feat: add directive to PublicArticleSearch

app/javascript/packs/portal.js

@@ -5,8 +5,10 @@ import Vue from 'vue';
 import { InitializationHelpers } from '../portal/portalHelpers';
 import VueDOMPurifyHTML from 'vue-dompurify-html';
 import { domPurifyConfig } from '../shared/helpers/HTMLSanitizer';
+import { directive as onClickaway } from 'vue-clickaway';
 
 Vue.use(VueDOMPurifyHTML, domPurifyConfig);
+Vue.directive('on-clickaway', onClickaway);
 
 Rails.start();
 Turbolinks.start();