applet: clear notification actions before adding new ones

[Mathieu Trudel-Lapierre <mathieu trudel-lapierre canonical com>]

Make sure we only ever have one of the "Don't show this again" button that
will trigger disabling notifications. Otherwise we end up with multiple
instances of the same button in notifications because one gets added every
time a new notification stacks on top of an existing one.

---
 src/applet.c |    1 +
 1 file changed, 1 insertion(+)

Index: b/src/applet.c
===================================================================
--- a/src/applet.c
+++ b/src/applet.c
@@ -924,6 +924,7 @@ applet_do_notify (NMApplet *applet,
        notify_notification_set_timeout (notify, NOTIFY_EXPIRES_DEFAULT);
 
        if (applet_notify_server_has_actions () && action1) {
+               notify_notification_clear_actions (notify);
                notify_notification_add_action (notify, action1, action1_label,
                                                action1_cb, action1_user_data, NULL);
        }