Feature Request: Summary comments when submitting reviews

Problem to solve

As an engineer who uses code review as a teaching tool across many teams, I often need to leave a lot of comments on a given review, especially if engineers are new to a given language or tool. I want to be able to leave a "summary" comment when submitting a code review, so that I can highlight things that went well, comments on the overall design, and to generally leave a friendlier message to folks.

This can lead help to frame feedback and also to establish better dialogue between reviewers and PR authors. It's a feature I miss a lot from other code review tools when using GitLab.

Intended users

I think the following roles are likely to benefit from this (but it's my first GL feature request so I am unsure):

User experience goal

Providing a place to ask broader questions, frame review comments, and provide a positive experience when receiving feedback.

Proposal

An initial implementation of this could be: When submitting reviews, the submission box could include a text field that if populated would become a free-standing comment on the review, submitted at the same time as the other feedback.

Links / references