Extend the audiofiles GET API to return both directories and audio
files. Also change the JSON format to include the name and type of all
entries.
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
Implement nicer configuration UI:
- Show human-readable names for config settings
- Show error message received from server if storing settings fails
- Show appropriate input elements for enum choice and numerical inputs
Signed-off-by: Matthias Blankertz <matthias@blankertz.org>
