3 years later and now im looking for this!
Ive kind of found a work around (i dont know if this has been said already) but i found that encrypting selected text bunches it up into a single line with dots over it
Ive encrypted my Chapter 1 Summary notes and put a simple password like "open". Not checking "remember password" means that you can just click out of the note and back into it and its collapsed! Hope this helped!
Having two chapter summaries and lecture notes in the one note is annoying but i have to have it like that otherwise it ruins my system! Hopefully the simpler hide/show box will be implemented soon.