[digikam] [Bug 374225] Add possibility to remove face identities by removing tag and remove person tags but preserving the tags themselves [patch]

[Simon]

https://bugs.kde.org/show_bug.cgi?id=374225

--- Comment #13 from Simon <freisim93 at gmail.com> ---
(In reply to caulier.gilles from comment #12)
> Yes this is the right way. But take a care this have side efeect with images
> metadata to sync with DB contents :
> 
> 1/ The user must do it himself trough Maintenance tool
> 2/ The user enable to "Use Lazy Synchronisation" option from metadata
> settings panel to place items to synchronize in a queue. This one is
> processed when user use Caption sidebar tab and options on the bottom or at
> end of digiKam session.
> 3/ All items are all processed when face tag is removed.
> 

I didn't think about that. This patch leaves the database and metadata out of
sync. This should never happen on purpose, right?
Actually the existing slotTagDelete method does that too. It uses
AlbumManager's deleteTAlbum method and I don't see any connection to file
metadata and testing confirms, that the tag is only removed from database. This
means the user has to do your point 1): manually sync through maintenance.

This is a bug, isn't it? No matter for what reason a tag is altered on an
image, if digikam is configured to write tags to metadata this should always be
done.

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