Hi. I’ve made a suggestion here, that might help you:
I proposed to have an option to include the notes into the expanding/collapsing mechanism of nodes. You could set notes to fully visible and collapse the child items together with their notes.
Granted, you’d have to collapse the children items by hand, but it would produce the same result, except you wouldn’t see the first line of the children’s notes.
What do you guys think? Would this be useful to you?