App Layout: consider low priority rooms filter

### Your use case

The new layout lists low priority rooms on top when rooms are listed by activity while I want them out of the way of more interesting rooms.

An extra tab will probably make the interface too cluttered and just listing them below the other rooms might put them too far out of reach, so I don't know what the best solution could be.

### Have you considered any alternatives?

_No response_

### Additional context

_No response_

### Are you willing to provide a PR?

No