It's in /usr/share/javascript/proxmox-widget-toolkit/proxmoxlib.js
, please make a backup and afterwards, restart pveproxy
.
No, it's not impolite to ask, not any more than to call a repository no-subscription when it should have been called testing, just to lure more free testers, only to chastise them for asking all sorts of questions they do not like.
The notice serves no purpose, a banner would have been more useful. It's not like anyone ever buys a subscription because they can't edit JS, it's only adding extra noise to the forum and allow some people to feel important.