WIP: Review Dropdown Dialog

Review Request #8184 — Created May 24, 2016 and discarded — Latest diff uploaded

Review Board

Attached is an experimental prototype for how the Review Dialog could look instead of the current modal dialog.

This is not posted for code review (needs a lot of cleanup); this is posted for general feedback and input from the RB team as to whether they have interest in this being upstreamed.

Visual usage and ensuring it maintains all current functionality.