Allow extension site access blacklisting

Feature Request: Currently extensions site access can be handled via “On all sites”, “On specific sites”, “On click”. Please add "On all sites except.

Ease of Implementation: Fundamental functionality already there. And UI can be copied from “On specific websites”.

Motivation: Important Security. Exclude sensitive websites like paypal from extension access (entered passwords and session cookies). https://www.kaspersky.com/blog/dangerous-browser-extensions-2023/50059/