Wait for notification-daemon to run before showing notifications.

Without this, the "Network card $NIC disabled" notification is
sometimes lost when MAC spoofing fails.

config/chroot_local-includes/usr/local/sbin/tails-spoof-mac

@@ -15,7 +15,15 @@ TEXTDOMAIN="tails"
 export TEXTDOMAIN
 
 show_notification() {
-    until pgrep gnome-panel >/dev/null; do
+    # We must wait until all the facilities necessary for showing the
+    # notification to the Live user is available to prevent it from
+    # getting lost.
+    # Note: We pgrep for notification-daemon's full command because
+    # otherwise pgrep will look at the process name, which seems to be
+    # cropped to 15 chars, i.e. "notification-da". Also, we probably
+    # do not want to get mixed up with "gdu-notification-daemon".
+    until pgrep gnome-panel >/dev/null && \
+          pgrep --full /usr/lib/notification-daemon/notification-daemon >/dev/null; do
         sleep 1
     done
     /usr/local/sbin/tails-notify-user "${1}" "${2}" 0