Since #289 a list item dropped its actions only when they were isConnected,
so the first render of jobs the store already knew (Activity opened from
another page) kept "Cancel job" on a finished or cancelled job and moved a
running job's progress after its actions. Activity's own list read renders
again a moment later and hides it, so the new spec holds that read and checks
the first render: no progress or Cancel job on the ended jobs, and a running
job's children in order heading, detail, progress, actions.
With the parentNode fix reverted it fails on chromium and touch (Expected 0,
Received 1 on the finished job); with it, it passes.