Existing XMP face tags should be used

[StefanOltmann]

I just imported by library which has proper face tags on every picture that I assigned with another software. I noticed this metadata is not recognized and the system wants me to yet again tag faces for thousands of images.

I expect the app to use the existing data to get to know „my people“ and use the information to tag any new incoming image.

Aa described in other issues I require face tags to be written back into the XMP so that other tools in my chain can use this information.