If a build has multiple kinds of failures (eg. 3 layout test failures and 2 javascriptcore failures), the popover does not display the individual items that failed. This bug is to track the addition of that feature.
Notes: At this stage, we could have JSC and Layout test results displayed within the bubble for multiple failures. The slightly harder part is making sure that the results are loaded smoothly, and choosing what to display if some results can't be loaded, etc.