When reviewing specific test cases in test results, the previous build urls contain 'rest' url (job/prevbuild/rest) in order to review the same component in the previous build. When there is a failed/unrun job in the previous build, the url is redirected to the main job build url and the 'rest' is lost. This is an issue with our QA testers when reviewing history of tests with unrelated failures. It would helpful if the sidebar panel held a url containing a valid 'rest' for previous/next build on failed jobs.