Show server name, not DNS stamp, in UI

### Prerequisites

- [X] I have checked the [Wiki](https://github.com/AdguardTeam/AdGuardHome/wiki) and [Discussions](https://github.com/AdguardTeam/AdGuardHome/discussions) and found no answer

- [X] I have searched other issues and found no duplicates

- [X] I want to request a feature or enhancement and not ask a question

### The problem

I'm trying to understand which server(s) AdGuard is talking to, but with all my upstreams named `sdns:/AQcAAAAAAAAA...` in the UI, I have absolutely no idea which server is which without constantly referring to a crib sheet.

### Proposed solution

Show the `tls://server.name...` decoded form of the DNS stamp in the UI.

### Alternatives considered and additional information

I'm not aware of any decent workarounds other than not using DNS stamps.

Issue #2801 is kinda related, but decoding the stamps on the settings page is both more difficult and less important than everywhere else, imo, because I can add comments to the stamps there, so I know which is which.

But I think the rest of the UI would benefit from decoding the stamps before showing them to the user.