on startup make sure we set the playing/selected source correctly so that clicking the toolbar playbutton doesnt start with a random track from the music library

coverart_browser.py

@@ -265,6 +265,9 @@ class ExternalPluginMenu(GObject.Object):
             gs = GSetting()
             setting = gs.get_setting(gs.Path.PLUGIN)
             setting[gs.PluginKey.VIEW_NAME] = view_name
+            player = self.shell.props.shell_player
+            player.set_selected_source(self.source.playlist_source)
+
             GLib.idle_add(self.shell.props.display_page_tree.select,
                           self.source)
         elif view_name == ListView.name:

coverart_play_source.py

@@ -112,6 +112,9 @@ class CoverArtPlaySource(RB.Source):
         self.plugin = plugin
         self.shell = shell
         self.source = source
+        player = self.shell.props.shell_player
+        player.set_playing_source(self)
+        player.set_selected_source(self)
 
     def do_selected(self):
         '''