Fix tooltip display in list views
After the recent UI changes the tooltips in a list view rendered behind the next object. This resets the tooltip's container to the body, rather than the individual issue-info
div. In particular, this change will be applied to all tooltips in GitLab. This should take care of any other unidentified issues like this and should not have any negative effects that I can think of. This fixes the bug I noted in !1255 (merged).
Current:
As proposed: