Make Unsafe Web Browser notifications work again.

Running `notify-send` as root doesn't show anything, so we fallback on
our reliable `tilas-notify-user` instead.

config/chroot_local-includes/usr/local/sbin/unsafe-browser

@@ -81,7 +81,7 @@ verify_start () {
 show_start_notification () {
     local title="`gettext \"Starting the Unsafe Browser...\"`"
     local body="`gettext \"This may take a while, so please be patient.\"`"
-    notify-send -t 10000 "${title}" "${body}"
+    tails-notify-user "${title}" "${body}" 10000
 }
 
 setup_chroot () {
@@ -214,7 +214,7 @@ run_browser_in_chroot () {
 show_shutdown_notification () {
     local title="`gettext \"Shutting down the Unsafe Browser...\"`"
     local body="`gettext \"This may take a while, and you may not restart the Unsafe Browser until it is properly shut down.\"`"
-    notify-send -t 10000 "${title}" "${body}"
+    tails-notify-user "${title}" "${body}" 10000
 }
 
 maybe_restart_tor () {