Restore CDModulePreferencesV3 to track the history of module prefrences.
This way, excluded endpoints may be saved globally to Core Data as a
starting point. Then in Profile.userInfo we only save the relevant
exclusions for the current configuration.
The .excludedEndpoints relationship is therefore moved out of
CDProviderPreferencesV3.
Further refactoring:
- ModuleViewParameters now includes a ModulePreferences observable that
module views can observe
- Tunnel doesn't need access to PreferencesManager anymore (exclusions
are in Profile.userInfo)
Store module preferences in the Profile.userInfo field for atomicity.
Access and modification are dramatically simplified, and synchronization
comes for free.
On the other side, fix provider preferences synchronization by using
viewContext for the CloudKit container.
Fixes#992
Davide