widgets: correctly install renderers
widgets: comment get_style_context
toolbar: define _selectionMode
toolbar: allow emitting signals
window: append views
views: artists: fix add_renderer
player: add playlist-item-changed signal
player: remove extra mpris definition
window: fix playlist class name
window: python has different way to handle arrays
window: correctly disconnect the signal
window: correctly call headerbar
view: user correct callback arguments
widgets: use correct arguments in callbacks
view: set correct params for _onStateChanged
window: set stack
grilo: use correct query for albums
_notifyModeDisconnect: update parameter
window: correctly create GLib.Variant
grilo: correctly create options and make requests