Create note to the right of selected note
Add up, down and left for add note
Add help for new creation based on selected note
Clarify feature tests with refactor
Test note creation based on selected note
Refactor move to create notes in part controller
Replace notes on selection controller if keystroke

* Create note replaces selected notes on selection controller
* Move to create note replaces selected notes on selection controller
Create notes same distance from selected

Retain rhythmic structure if there are multiple notes selected that have
different durations
Use the selectionBox actions
Always select added notes
Inline adjacent note calculations
cleanup