added jquery and also fixed fontawsome

Helpdesk/Resources/assets/css/app.css

@@ -0,0 +1 @@
+.helpdesk-module{}

Helpdesk/Resources/assets/js/app.js

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+import './bootstrap';
+import Sortable from 'sortablejs';
+
+window.Sortable = Sortable;
+console.info('Helpdesk module assets loaded');

Helpdesk/Resources/assets/js/bootstrap.js

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+import axios from 'axios';
+
+window.axios = window.axios || axios;
+window.axios.defaults.headers.common['X-Requested-With'] = 'XMLHttpRequest';

Helpdesk/Resources/assets/sass/app.scss

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+.helpdesk-module {
+    min-height: 100vh;
+}