Request for review of draft: Resolvable comments in Writer

I have a draft patch series which adds the ability to mark comments in 
Writer as resolved. This has had some discussion on 
https://bugs.documentfoundation.org/show_bug.cgi?id=119228. 
<https://bugs.documentfoundation.org/show_bug.cgi?id=119228>

The patches are https://gerrit.libreoffice.org/#/c/74455/ and the 
related changes.

At the moment, this only works for Writer. We haven't established where 
to store the resolved flag in the document format, so temporarily this 
series adds a new XML tag called 'resolved'. Ignoring this for the time 
being, does the rest of the patch series look viable?

Jim MacArthur