refs #23260 [finc]

* add ajax handler to retrieve count of ill requests
* move menu.phtml from finc-accessibitily to finc and and update menu.phtml to contain all possible menu items.
* add sub menu "prefences" to menu.phtml
* add translation strings for use in browser
* override vufinds account_ajax.js to meet fincs account menu needs
* guard menu against missing route exception
* hide ill count if number of ill requests is zero
* add doc header and comments to account_ajax.js
* remove duplicated item in menu.phtml