R1:9e096cd274b0

Give the workboard "default" workflows more modern state handling

Summary:
Depends on D20628. Ref T4900. Currently, the "Save Current Order/Filter As Default" flows on workboards duplicate some state construction, and require parameters to be passed to them explicitly.

Now that state management is separate, they can reuse a bit more code and be made to look more like other similar controllers.

Test Plan:
- Changed the default order of a workboard.
- Changed the default filter of a workboard.