note/edit - Edits an existing note.

Method parameters:
id - The ID of the note to edit.
text - The new text of the note.
encrypt_in_listings - Whether the note should be encrypted in listings.
password_protect - Whether the note should be password-protected. This option is available with a password-authenticated session only.
tags - A space-separated list of tags.

Returns a JSON document of the following format:
<boolean> - Always true.

Expected errors:
NOTE_NOT_FOUND - A note with the ID doesn't exist.
ENTER_TEXT - The new text is empty.
TOO_MANY_TAGS - More than 5 tags given.
CANNOT_PASSWORD_PROTECT - A password-authenticated session is required to password-protect the note.