Gtk/GLib warnings while adding/removing devices

That is what I get when I unplug/plug several times my wifi dongle:

[FATAL 11:10:38.404567] [GLib] g_ptr_array_foreach: assertion 'array' failed
[FATAL 11:10:47.369230] [GLib] g_ptr_array_foreach: assertion 'array' failed
[FATAL 11:10:49.105275] [Gtk] gtk_container_remove: assertion '_gtk_widget_get_parent (widget) == GTK_WIDGET (container) || GTK_IS_ASSISTANT (container) || GTK_IS_ACTION_BAR (container) || GTK_IS_POPOVER_MENU (container)' failed
[FATAL 11:10:56.038717] [GLib] g_ptr_array_foreach: assertion 'array' failed
[FATAL 11:11:06.924463] [GLib] g_ptr_array_foreach: assertion 'array' failed
[FATAL 11:11:10.510412] [Gtk] gtk_container_remove: assertion '_gtk_widget_get_parent (widget) == GTK_WIDGET (container) || GTK_IS_ASSISTANT (container) || GTK_IS_ACTION_BAR (container) || GTK_IS_POPOVER_MENU (container)' failed
[FATAL 11:11:57.090664] [GLib] g_ptr_array_foreach: assertion 'array' failed
[FATAL 11:11:58.991527] [Gtk] gtk_container_remove: assertion '_gtk_widget_get_parent (widget) == GTK_WIDGET (container) || GTK_IS_ASSISTANT (container) || GTK_IS_ACTION_BAR (container) || GTK_IS_POPOVER_MENU (container)' failed

Launchpad Details: [#LP1508376](https://bugs.launchpad.net/bugs/1508376) xapantu - 2015-10-21 09:20:45 +0000

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