Approval Indication on Merge Requests List View
### Description It would be nice to have an easily recognizable visual indication of the assignees which have approved each Merge Request within the list view. ### Proposal It would be nice to have an indicator on the gravatar thumbnail of the assignee(s) showing whether that approver has added their approval on the Merge Requests list view. I imagine the tooltip would display something like *"Assigned to dev1, dev2, and dev3. Approved by dev1 and dev3."* Along that vein, it would be nice if the thumbs up and thumbs down counters would display tooltips listing the users which marked each state. ### Links / references ### Documentation blurb #### Overview Oftentimes I refer to the Merge Requests list to find pending items I have yet to address or approve. If I don't remember whether I had previously reviewed and approved a Merge Request, I must view that Merge Request directly and inspect the list of approvals. Being able to see whether I had already given my approval directly from the list would greatly improve my workflow efficiency. #### Use cases Pretty wide use. ### Feature checklist Make sure these are completed before closing the issue, with a link to the relevant commit. - [ ] [Feature assurance](https://about.gitlab.com/handbook/product/#feature-assurance) - [ ] Documentation - [ ] Added to [features.yml](https://gitlab.com/gitlab-com/www-gitlab-com/blob/master/data/features.yml)
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