Load extensions JS before page-specific code for reviewable pages.

Review Request #9193 — Created Sept. 13, 2017 and submitted — Latest diff uploaded

Information

Review Board
release-3.0.x
8dee384...

Reviewers

Review request fields and entries now support extension-provided view classes,
but the code that used them was parsing before the extension-provided JS was
loaded, making things fail. I've overridden the relevant blocks for the
view_diff.html and review_detail.html templates, loading all the JS before
page-specific code.

Used this in conjunction with an extension-provided field view class.