Feature request: Another URL preview option

When I paste a URL into a message, Keybase pops up a menu offering these 5 options for generating a preview: "Always, for any site"; "Always, for DOMAIN"; "Yes, but ask me again for DOMAIN"; "Not now"; and "Never, for any site". Rarely is one of these five the option I actually want. What I nearly always want, and look for every time, and am invariably disappointed not to see, is "Never, for DOMAIN", i.e., don't bother previewing links to the site whose link I'm pasting. So instead I press "Not now" and then subject myself to this popup again the next time I paste a link, i.e., every time. So, how about such an option?

Start by locating the Keybase client code that builds the URL preview options menu and compare the existing five choices with this request. Confirm how site-specific preview preferences are stored and tested before making changes. Done means the menu offers “Never, for DOMAIN” and selecting it suppresses future previews for that domain.

Written by the indexing model from the issue text.