Walks the Clay config items and builds a map from each item's message key to its declared default value, so the same defaults apply whether or not the user has opened the settings page yet.
The Clay config items to walk, including any nested items.
A map from message key to default value.
Walks the Clay config items and builds a map from each item's message key to its declared default value, so the same defaults apply whether or not the user has opened the settings page yet.