Some followup in T7841 and elsewhere but this is substantially functional.

All typeaheads/tokenizers should still work correctly.

A big chunk of this is in HEAD. This should be where we are, roughly:

In D12444 I changed the default Differential query to use viewer(), instead of implicitly resolving the user's PHID. That means that when you "Edit Query", you get:

I cheated them into existence, but unified, browsable lists do work now:

I think I'm going to give up and use offset paging.

This is opening up into some very deep infrastructure work.

Although tokenizer/typeahead stuff is churning a bit in connection with T4100 right now so this should probably wait for that to settle down.

I think we wrote this before typeaheads were modularized (T4420) so it wasn't easy to add a composite datasource at the time.