Fix: CSS to reveal hidden or partially visible avatars on 2nd line topic map



clear:left was added to an existing selector that match other elements that may no need it.
in case of a negative affect it should be moved to its own selector
```
.topic-map .links {
}
```

https://meta.discourse.org/t/topic-details-participants-avatars-not-all-items-can-be-shown/18781