[Suggestion] Improve unlock mechanism when changing master key

[ghost]

Change master key after setting up Windows Hello, then lock and unlock the database, you'll see that this plugin fails unlocking the database.

1)It should prompt for standard unlock when failed unlocking with stored key;
2)It should check if composite key is still unlockable after unlocking database with standard unlock prompt;
3)It should ask for setting up Windows Hello again after changing the master key.

[Angelelz]

No. 1 should be a good addition.
No. 2 could be added but I don't think it's high priority.
No. 3 I have to check if there is any "ChangedMasterKey" event I can subscribe to, to be doable.

[Angelelz]

Ok, after tinkering a bit with the code:
No. 1 will be fixed but I will also add a warning after the deletion of WinHelloUnlock data. That way, when you unlock again (with standard prompt), the database will be treated like a new database and you will be asked to create WinHelloUnlock data.
No. 2 will not be added because the plugin would need to prompt the user for Windows Hello auth in order to check whether it can unlock the database.
No. 3 will not be added because there no event that notifies me whenever a database's master key has been changed.