UI updates to support pcc licenses.
Merge branch 'master' of https://github.com/densho/ddr-public
print time and info about app server (pid, host, commit) in base.html
pin sort-thumbnail bc errs with remote files in v11.12.1b

For some reason version 11.12.1b fails when trying to thumbnail
remote files so don't use that version.
Merge branch 'master' into 149-elasticsearch-docstore

Conflicts:
	ddrpublic/ui/templates/ui/license-pcc.html