Parses one nav item setting. Returns null, and logs, when the value is not a JSON object with a Label and a Route or ResourceType. An extension never sets the application's default item, so isDefault is dropped.
isDefault
Parses one nav item setting. Returns null, and logs, when the value is not a JSON object with a Label and a Route or ResourceType. An extension never sets the application's default item, so
isDefaultis dropped.