Dynamic collections - list all instances of selected classes

[joepio]

In the first version of atomic-server, we relied quite heavily on server-side generated collections like /documents and /classes. These were resources where the servers would list the instances / members.

We currently don't use these Collection views. I haven't seen them for a while, at least. Part of the reason is we rely quite heavily on hierarchical structures, e.g. a folder where you put a document in.

But what if you want to see all your documents? Or all the chatrooms in the drive? We need some view for this. Some ideas:

• We have a classess item in the sidebar, which list all the resource types like Document and Todo. Click a type, see a list of all the instances.
• We could use the Table editor for this view, since it is class-based. But this won't work for mixed types.
• We have a powerful query view, which doesn't allow editing, but has a bunch of query options (sort, filter, view type). My fear is that this overlaps too much with Table editor, and leads to a lot of code that needs to be maintained.
• Maybe we can still use the Table view, have a table view that lists name, description and nothing for mixed classes, and still allow other views for specific classes.