Mark merge request that was merged because it was identical with the one actually merged

Description

I had two branches pointing to the exact same commit. I created a MR to master from both of them. The two branches had different CI and permissions, so they were not exactly identical. I accepted one of the MRs, and the other appears as "merged". That in itself I guess is OK, because it's a single commit, and if it's merged, it's merged. But there is no indication of which one of the MRs was accepted

Proposal

Add some descriptive text, something like:

Merged by User via id x minutes ago

where id is the reference to the MR that was accepted.

Links / references

Jellby/test!4 was accepted Jellby/test!3 was merged as a side effect of the above