Fixes bug #376502 - multi-screen support for GtkStatusIcon

Fixes bug #376502 - multi-screen support for GtkStatusIcon

2006-11-19  Mark McLoughlin  <mark@skynet.ie>

        Fixes bug #376502 - multi-screen support for GtkStatusIcon

        * gtk/gtkstatusicon.[ch]:
        (gtk_status_icon_set_screen),
        (gtk_status_icon_get_screen): add multi-screen API. Allows
        an app to display an icon on a non-default screen
        (gtk_status_icon_class_init),
        (gtk_status_icon_set_property),
        (gtk_status_icon_get_property): add a "screen" property

        * tests/teststatusicon.c: update to test on multiple screens