MR Popover is not attached in system notes
Summary
There is no tooltip or popover on MR References in system notes
Steps to reproduce
Reference a MR (e.g. !1 (closed)) in another issue or MR (e.g. !2 (merged)) and go to the referenced MR (!1 (closed)). There will be a note saying something along the lines of "This merge request was referenced in !2 (merged)" and notice that there is no popover or tooltip.
Example Project
https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/11420#note_163303177
What is the current bug behavior?
There is no tooltip or popover
What is the expected correct behavior?
There should be a tooltip or popover