On visiting the PublicRootShareNode include active public rooms (the ones currently being visited) and the ones listed persistently.
On visiting the PublicRootShareNode include active public rooms (the ones
currently being visited) and the ones listed persistently.

New PublicRootShareNode.get_subdir_prospects() handily consolidates of
active and persisted lists.

SpiderOak/so_client_html5,SpiderOak/so_client_html5