When accessing an extension's database views (such as Review Bot's

Tools entries), URL lookups for pages in Review Board's main database

pages would fail to resolve, breaking rendering of the page.
This happens due to the usage of the current_app support in URL

rendering. This is a method that's used to limit which URLs may be

matched when resolving a URL. If request.current_app is set in a view

(which is the case for any given AdminSite), then any calls to

{% url %} will pass it in to reverse().
In this particular case, reversing admin:XYZ with a

current_app='test' would match only in test's admin:... URLs, and

would fail to find an admin:XYZ in some other app.
The solution in our case is to precompute the URLs before rendering the

template, letting us bypass the current_app mechanism. This is being

done in the {% admin_sidebar %} template tag, which handles the

rendering.

Accessed the Review Bot database views. The pages rendered correctly,

and all sidebar links worked.
Tested the main admin UI pages. They also worked correctly.