Map G_NOTIFICATION_PRIORITY_HIGH to NOTIFY_URGENCY_NORMAL
Map G_NOTIFICATION_PRIORITY_HIGH to NOTIFY_URGENCY_NORMAL

When using the Freedesktop backend for GNotification, it seems like a
better idea to map G_NOTIFICATION_PRIORITY_HIGH to NOTIFY_URGENCY_NORMAL
(instead of NOTIFY_URGENCY_CRITICAL) provided that the difference
between GNotification's NORMAL and HIGH priorities is minor.

Signed-off-by: Adrian Perez de Castro <aperez@igalia.com>

https://bugzilla.gnome.org/show_bug.cgi?id=784815

endlessm/glib,johne53/MB3Glib,endlessm/glib,endlessm/glib,endlessm/glib,johne53/MB3Glib,johne53/MB3Glib,johne53/MB3Glib,endlessm/glib,johne53/MB3Glib,johne53/MB3Glib