Much like inspect(localStorage) or inspect(node) switch to their respective sections, we should do the same for applicationCache, or even an indexed DB.
Closing as invalid, as this bug pertains to the old inspector UI and/or its tests. Please file a new bug (https://www.webkit.org/new-inspector-bug) if the bug/feature/issue is still relevant to WebKit trunk.
This is a legit issue still.
<rdar://problem/19281590>