Fix Javascript issue on non sqlite databases

When a non sqlite database is used, loading the admin interface fails
because the backup button is not generated.
This PR is solves it by checking if the elements are valid.

Also made some other changes and fixed some eslint errors.
Showing `_post` errors is better now.

Update jquery to latest version.

Fixes #3166

src/static/scripts/admin_organizations.js

@@ -1,6 +1,8 @@
 "use strict";
+/* eslint-env es2017, browser, jquery */
+/* global _post:readable, BASE_URL:readable, reload:readable, jdenticon:readable */
 
-function deleteOrganization() {
+function deleteOrganization(event) {
     event.preventDefault();
     event.stopPropagation();
     const org_uuid = event.target.dataset.vwOrgUuid;
@@ -28,9 +30,22 @@ function deleteOrganization() {
     }
 }
 
+function initActions() {
+    document.querySelectorAll("button[vw-delete-organization]").forEach(btn => {
+        btn.addEventListener("click", deleteOrganization);
+    });
+
+    if (jdenticon) {
+        jdenticon();
+    }
+}
+
 // onLoad events
 document.addEventListener("DOMContentLoaded", (/*event*/) => {
     jQuery("#orgs-table").DataTable({
+        "drawCallback": function() {
+            initActions();
+        },
         "stateSave": true,
         "responsive": true,
         "lengthMenu": [
@@ -46,9 +61,10 @@ document.addEventListener("DOMContentLoaded", (/*event*/) => {
     });
 
     // Add click events for organization actions
-    document.querySelectorAll("button[vw-delete-organization]").forEach(btn => {
-        btn.addEventListener("click", deleteOrganization);
-    });
+    initActions();
 
-    document.getElementById("reload").addEventListener("click", reload);
+    const btnReload = document.getElementById("reload");
+    if (btnReload) {
+        btnReload.addEventListener("click", reload);
+    }
 });