The search box filtered only the 100 rows on screen, in the browser: an
older row seemed not to exist. The page now searches on the server, in
every row's user, host, VM, VM UUID, message and IP, as plain text, and
can show the failed rows only; its pages keep the search.
Failed rows are marked red, dates carry the year and the time zone, and
a VM's rows link to the VM while it is in the panel. Excel downloads the
rows the search chooses, all pages of them, with the VM report's
workbook (text stays text).
A VM that disappears from its compute keeps its owners in a tombstone
until INSTANCE_OWNERSHIP_RETENTION_DAYS pass, but nothing showed them.
Superusers now see them on the "Removed VMs" admin page (name, UUID,
owners, removed, expires) and can remove one, so a VM deleted on
purpose no longer hands its owners to a later VM with the same UUID.
