[openstreetmap/openstreetmap-website] Mark discussed changesets in the history (Issue #3621)

[Hufkratzer]

### Description

In the history of an object, mark the changeset if it has a discussion, e.g. like this:
<img width="197" alt="discussed" src="https://user-images.githubusercontent.com/5958184/180888822-32ba259b-edeb-4c18-aa89-65efdaac0c40.png">



### Screenshots

_No response_

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