Criticals when zooming after opening and closing a window
(org.gnome.Whatever3:319019): GLib-GObject-WARNING **: 17:36:39.672: invalid unclassed pointer in cast to 'KgxWindow'
(org.gnome.Whatever3:319019): Gtk-CRITICAL **: 17:36:39.673: gtk_label_set_label: assertion 'GTK_IS_LABEL (label)' failed
(org.gnome.Whatever3:319019): GLib-GObject-WARNING **: 17:36:40.521: invalid unclassed pointer in cast to 'KgxWindow'
(org.gnome.Whatever3:319019): Gtk-CRITICAL **: 17:36:40.522: gtk_label_set_label: assertion 'GTK_IS_LABEL (label)' failed
Looks like we forget to disconnect something.