Update admin interface (#4737)

- Updated datatables
- Set Cookie Secure flag if the connection is https
- Prevent possible XSS via Organization Name
  Converted all `innerHTML` and `innerText` to the Safe Sink version `textContent`
- Removed `jsesc` function as handlebars escapes all these chars already and more by default

src/static/scripts/datatables.css

@@ -4,10 +4,10 @@
  *
  * To rebuild or modify this file with the latest versions of the included
  * software please visit:
- *   https://datatables.net/download/#bs5/dt-2.0.7
+ *   https://datatables.net/download/#bs5/dt-2.0.8
  *
  * Included libraries:
- *   DataTables 2.0.7
+ *   DataTables 2.0.8
  */
 
 @charset "UTF-8";