R1:f0147fd8add1

Allow workboards to be filtered with ApplicationSearch

Summary:
Ref T4673.

IMPORTANT: I had to break one thing (see TODO) to get this working. Not sure how you want to deal with that. I might be able to put the element //inside// the workboard, or I could write some JS. But I figured I'd get feedback first.

General areas for improvement:

- It would be nice to give you some feedback that you have a filter applied.
- It would be nice to let you save and quickly select common filters.
- These would…