Use Songs view as default playlist for MPRIS

[kyoushuu]

If Play() is called through MPRIS and there's no playlists running, switch to Songs view and play first song.

[vrutkovs]

Crashes on clicking MPRIS play:

* Skipping gnome-music (package and dependencies not updated) * [1/1] * success * [1/1] Gtk-Message: Failed to load module "pk-gtk-module" Gtk-Message: Failed to load module "canberra-gtk-module" Detected new source available: 'Tracker' and it supports search Not Found /opt/gnome/lib/python3.3/site-packages/gnomemusic/view.py:362: Warning: g_value_unset: assertion 'G_IS_VALUE (value)' failed item, self.nowPlayingIconName, False, False]) /opt/gnome/lib/python3.3/site-packages/gnomemusic/view.py:362: Warning: g_value_type_transformable: assertion 'G_TYPE_IS_VALUE (src_type)' failed item, self.nowPlayingIconName, False, False])

(gnome-music:4474): Gtk-WARNING **: gtkliststore.c:848: Unable to convert from (null) to gchararray

Traceback (most recent call last): File "/opt/gnome/lib/python3.3/site-packages/gnomemusic/mpris.py", line 153, in _play_first_song model.disconnect(self.first_song_handler) File "/opt/gnome/lib64/python3.3/site-packages/gi/overrides/GObject.py", line 438, in wrapper return func(_get_instance_for_signal(obj), _args, *_kwargs) TypeError: argument instance: Expected GObject.Object, but got PyCapsule

First song is not available in my playlist btw

[vrutkovs]

If Songs view is not selected crashes with:

Detected new source available: 'Tracker' and it supports search
Traceback (most recent call last):
  File "/opt/gnome/lib/python3.3/site-packages/gnomemusic/mpris.py", line 153, in _play_first_song
    model.disconnect(self.first_song_handler)
  File "/opt/gnome/lib64/python3.3/site-packages/gi/overrides/GObject.py", line 438, in wrapper
    return func(_get_instance_for_signal(obj), *args, **kwargs)
TypeError: argument instance: Expected GObject.Object, but got PyCapsule