- Adds a #recoveryInProgress member to BackupService to limit to one recovery at a time
- Adds recoveryInProgress and recoveryErrorCode properties to the BackupSettings component
- Has BackupUIChild set recoveryInProgress / recoveryErrorCode while a recovery is underway.
- Keeps the restore dialog open while the recovery is underway, disables the confirm button and updates it's text to "Restoring..."
- Has BackupUIChild close the recovery dialog if recovery is successful.
Figma: https://www.figma.com/design/vNbX4c0ws0L1qr0mxpKvsW/Fx-Backup?node-id=147-4568&t=rmWErO2I6lpY3Vz7-0
Differential Revision: https://phabricator.services.mozilla.com/D215677
96c11a71e5