Not so much a new feature as a ‘Please don’t lose the old functionality.’
As of a couple of weeks ago there were some fairly major changes in the way favourites are handled in Leia.
https://github.com/xbmc/xbmc/pull/11967
The idea is that favourites are kept in memory rather than being reloaded from favourites.xml eachtime they’re needed.
That sounds great, more efficient, probably has a ton of advantages that I can’t think of. There are times, though, when it would be useful to be able to reload the favourites from favourites.xml. At the moment the only way I can see to do that is by restarting kodi (or presumably changing profiles).
So the request is basically for an equivalent function to ‘reloadkeymaps’ for favourites.
I doubt many people will even notice the lost functionality, but for me being able to edit favourites manually is something I’ve found really useful.