Dropdown to choose versions to compare in MR is not helpful
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### Description
When trying to review a partial diff in an MR that includes several commits, this dropdown is all we have:

The problem is that I never created such versions, and I also cannot remember which commit SHA refers to which change.
### Proposal
The dropdown is OK, but it needs to include more human-friendly info, such as:
- Author avatar/name
- Commit message
issue