In flock.midi.connectionView and other components, ensure listeners are bound to its underlying connection, not directly shared

[colinbdclark]

As pointed out by @amb26 in reviewing the pull request for #30, we shouldn't be directly sharing events between components, we should be binding listeners between them instead.

[colinbdclark]

It looks like this is a common practice throughout the library, and needs to be addressed in:

• [ ] flock.midi.controller
• [ ] flock.midi.connectorView
• [ ] flock.midi.portSelectorView