Set the image of a button proxy to the "icon-name" property.

Set the image of a button proxy to the "icon-name" property.

        * gtk/gtkaction.c (connect_proxy): Set the image of a button
        proxy to the "icon-name" property.

        (gtk_action_set_short_label):  If the "image" property is set
        on the button proxy, also tries to set the "label" property on
        the GtkButton.

svn path=/trunk/; revision=20363