Notification when all moves of a chapter/study are learned, % to completion display?

[mushrowan]

as title says - I'm not aware of listudy doing this already, but apologies if i've missed some button to turn this on or something!

[ArneVogel]

Added with https://github.com/ArneVogel/listudy/commit/2e0b4633f34b8914d15b6d839e37e00384a9292d Thanks for the suggestion.