User data improvements

[Luke 42077]

With the next release, two new properties will be added to UserData:

 

• PlayedPercentage
• UnplayedItemCount

 

Moving these to user data will allow updates to be sent for these values via socket notifications. They'll continue to remain duplicated on the item itself for a while, for your compatibility.

 

Also PlayedPercentage will be supplied for both media and folders, so you won't have to calculate it manually anymore.