When spell checking a book there's usually a large amount of words to be reviewed and this takes a long time, so I often check a number of words and then resume the job on the next day.
Now, when I open the book in Sigil I would expect the spell check not to detect as mispelled all those words I had added to the dictionary on the previous session, but they keep coming up

. Same thing if I had ignored them.
What would be the way to tag the already reviewed words?