R1:c1558031c290

Make various small quality-of-life improvements for Almanac properties

Summary:
Depends on D19341. Ref T12414. Ref T13120.

- Fix a bug where default-valued properties didn't get rendered in grey as they're supposed to (as a hint that the value isn't customized).
- When resetting a builtin property won't do anything, visually disable the button as a hint.
- Allow Services to specify properties on their Bindings.
- Specify that repository bindings have a "protocol" property, so it becomes an…