Fix unit tests for DraftReviewBannerView.

Review Request #9066 — Created July 10, 2017 and submitted — Latest diff uploaded

Information

Review Board
release-3.0.x
9f71b49...

Reviewers

My recent work for the draft review banner resulted in some broken
JavaScript unit tests, due to the switch from using the display style
for visible/hidden to CSS classes. This fixes up the affected unit
tests.

All unit tests pass.