It's a bit confusing that the created date has to be set when creating a
new note, and the path had to be constructured properly, without which
the note shouldn't be saved. Ideally, an object shouldn't be able exist
in such an inconsistent state.
It seems we are moving towards a more generalized Note taking
application. I'd still like to use it for both Note taking and
Journaling. I'm not sure how to clearly show it is meant for both.
Now when adding/editing/removing a note, it gets modified from the
directory it was present in. There is no longer a just a plain list of
all notes, but always a tree of notes, which are inside Folders.
