Add a review request hover preview.

Review Request #8508 — Created Oct. 30, 2016 and discarded — Latest diff uploaded

Information

Review Board
master

Reviewers

When the cursor moves over top of a review request in the dashboard a small
preview of the review request will be shown, similar to the user preview box.

Added 2 unit tests, checked infobox on dashboard, all review requests
and user pages.