These buttons directly affect audio playback, so let's move them with
the rest of the audio buttons.
Signed-off-by: Anna Schumaker <Anna@OcarinaProject.net>
This calls the audio :: play() function, rather than having the button
call into the audio layer directly. With this patch, the on_play()
callback is unused.
Signed-off-by: Anna Schumaker <Anna@OcarinaProject.net>