Start to switch over to maintaining an independent list of public share-rooms.
Start to switch over to maintaining an independent list of public
share-rooms.

There are at least a few scenarios suggesting we must support
visiting share rooms from one's account.  When people have more than one
account, the publicly visited listing can be a handy way to keep track of
items between those accounts. It doesn't make sense to remove persisted
visited share rooms just because one happens to log into a storage account
that originates them.

SpiderOak/so_client_html5,SpiderOak/so_client_html5