Add breadcrumb to containers panel

When user has drilled down into pseudo-folders, display a hyperlinked
breadcrumb list to show user where they currently are. User can also
navigate up the hierarchy using the breadcrumbs.

Screenshot is available from
https://region-b.geo-1.objects.hpcloudsvc.com/v1/40876871865944/cont/breadcrumb.png

Closes-Bug: #1260864
Change-Id: I0af081badbc23751999a985d9e02421a84af1059
Merge "Add breadcrumb to containers panel"