The TrackView sets up a scrollable Gtk.ColumnView inside a nice looking
frame. It also creates a FilterListModel for filtering tracks in a
separate layer from the Playlist so we don't affect choosing the next
track.
Finally, I add the TrackView to the TrackList Card.
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>
For now it only has the Gtk.CenterBox child with an entry.Filter widget,
but this will be expanded on in future patches. I also take the chance
to bind the factory:visible-playlist property to the playlist displayed
in the tracklist.
Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>
