Can't save modified strings in FormProvider

[vi0110]

In Main tab, when I change some provider settings like login@password in FormProvider and click on Save --- changes are not saved.
I had to edit DanbooruProviderList.xml manually.
Think this occurs because that new feature --- per-provider tags.xml, because in DanbooruProviderList.xml there are new string on each provider: HasPrivateTags & ProviderTagCollection; maybe it interferes (sorry, I know that you know it, just trying to describe the details of my point of view).

Anyway thank you for adding per-provider tags.xml!