This widget will be added to the Volume popover and allow configuring a
lower volume for background listening while focusing on tasks.
Implements: #50 ("Background Music Mode")
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>
The plan is to convert the volume control panel into a Gtk.ListBox for a
more modern appearance.
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>
I can't use a Gtk.VolumeButton because I want to add ReplayGain controls
under the popover menu as well.
Implements: #46 ("Create new Volume controls")
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>
