Automatic password update when changing the storage type

There are different storage types for Password properties, for example clear, hash, encrypt. When changing the storage type for such a property, the property instances (actual passwords) are not changed, automatically, only when changing (or simply re-saving) the password. This might lead to a false sense of security, since the class might say that passwords are encrypted, while in reality most existing passwords are still stored in plain text.

Ideally, when changing the storage type between two compatible types (for example from clear text to encrypted), all instances should be automatically converted.