R1:a72d18765f85

Basic "Install Dashboard" workflow

Summary: Ref T12264. This allows users to install a dashboard they are viewing to their personal home menu or as a global home menu item. Has some basic ability to be extended later for maybe projects.

Test Plan:
Build a dashboard, click "Install Dashboard".

- As user only get personal option
- As HomeApp edit person, see both options
- Try installation as either, with and without label set
- Fake "global" form as user, get error
- Don't set anything, get error…