Mark notes modified on import

closes #87
added ctrl+s for edit box
added ctrl+s for omnibox
Merge pull request #92 from HaleyB-E/ctrlS

Added ctrl+s to omnibox and edit box
closes #84
Add characters to KeyCode
Fix reinsertion of note on edit after import

Falsy pinned values were considered different causing the note to be
reinserted on edit. While not a problem when pinned was defined,
imported/synced notes don't necessarily have pinned defined.
Better cleanup the editor

Ensures that the editor is removed from notes when they are hidden. Also
ensures that the note-text is shown. This should finally completely
fix #35.