* Added basic navigation test for StandardCamera & SoundRecorder
* Abstracted camera nav buttons and used in SoundRecorder
* Show sounds in the MediaViewer
* Added sounds to ObsEdit, w/ MediaViewer support
* Ensure sounds get both uploaded and added to observations
* Local sound deletion
* Remote sound deletion
* Rudimentary and deeply unperformative sound visualization
Closes#869
f45108036f