Progress on  #1343

FR page flow doesn't specify its own handlers.
Fix #1186 and #1333

- #1333
    - add standard `autosave` property to specify whether providers support autosave
    - add standard `active` property to specify whether providers are active
    - autosave disabled if
        - provider does not support it
        - autosave-delay not positive
- #1186
    - home page does not search inactive providers