Merge per client's different addresses in top clients.

### 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 just found out that the *top clients* part in dashboard will show per client's all different addresses, is that a feature?

### Proposed solution

Maybe merge per client's different addresses will be great :)

### Alternatives considered and additional information

Make it optional to choose how to show in dashboard.