Implement `Fully Specced Out` Extended Merge Request Popover
<!--IssueSummary start--> <details> <summary> Everyone can contribute. [Help move this issue forward](https://handbook.gitlab.com/handbook/marketing/developer-relations/contributor-success/community-contributors-workflows/#contributor-links) while earning points, leveling up and collecting rewards. </summary> - [Close this issue](https://contributors.gitlab.com/manage-issue?action=close&projectId=278964&issueIid=27424) </details> <!--IssueSummary end--> Follow up issue to https://gitlab.com/gitlab-org/gitlab-ce/issues/54916 | Fully specced out | Ready to merge | Barebones | Skeleton loading | |-------------------|----------------|-----------|------------------| | ![image](/uploads/85ef2f2895cbd294ef80c2e87df36c00/image.png) | ![image](/uploads/e3641bda3b439a427eedd94ea8601429/image.png) | ![image](/uploads/449a5630ce986aec1678d52b8df4b660/image.png) | ![image](/uploads/532d289c3d16e07c477cfb04ddede255/image.png) | In initial pass, we only did the `Barebones` version of this. There is some work to be done to add statistics and creator/assignee to the bottom This design adds the following: - Assignee - Milestone - Tasks completed/total - MR Health - Originally from https://gitlab.com/gitlab-org/gitlab-ce/issues/47007, this gives a good idea of how far towards being merged a MR is. - *We wouldn't be showing extra tooltips on top of a tooltip though.* - ![image](/uploads/92b6bcea64dbd1203569743a2cc2ae09/image.png)
issue