Persist config more often

[j5v]

Currently, the configuration does not persist in localStorage unless the user selects Configure from the toolbar, then Save (without necessarily making changes to the configuration).

As a user, I want configuration to persist with major changes of UI state or data, particularly when:

• I add, remove, or duplicate a tuning.
• I change any note data.
• I close the app.
• I change any configurable profiles (future feature).

Perhaps selection of notes can be exempt, or on a debounced timer, so that selections and limits save infrequently.

[j5v]

Perhaps selection of notes can be exempt, or on a debounced timer, so that selections and limits save infrequently.

Not done. Suggest splitting to new issue.