Bug 552959 – GtkTrayIcon: _NET_SYSTEM_TRAY_VISUAL and real

    Bug 552959 – GtkTrayIcon: _NET_SYSTEM_TRAY_VISUAL and real
        transparency

        * gtk/gtktrayicon-x11.c: Add support for the _BET_SYSTEM_TRAY_VISUAL
        property described in
        http://lists.freedesktop.org/archives/xdg/2008-September/009919.html
        If _NET_SYSTEM_TRAY_VISUAL is a visual with an alpha channel, the
        parent-relative-background hack is skipped and we draw with a real
        transparent background.

        * gtk/gtkrc.c: Remove the default GtkTrayIcon style, since the
        parent-relative background is now set when realizing the tray
        icon.

        Patch by Owen Taylor

svn path=/trunk/; revision=21531