a36294e7c7
Remove mail_folder_cache_service_added() and rely instead on mail_folder_cache_service_enabled()/disabled(). Despite the function names the folder cache doesn't actually care about enabled status, it simply maintains a set of CamelStores to monitor. We should refactor the folder cache API to better reflect that. EMailAccountStore always immediately follows a "service-added" signal emission with either a "service-enabled" or "service-disabled" emission, which will add or remove the service from the folder cache.