Personalize source icon

[davidoskky]

Many websites don't have a favicon or it is not correctly fetched.
It would be nice to have a way to upload a source icon manually.

[jtojnar]

Nice idea. I gave it some thought and came up with a UX that I think could work:

Screencast.from.2023-07-30.11-39-24.webm

As a bonus, it will open the door for other long requested features.

Opened a PR with client side part of that: #1461