network manager icon disappeared

[markling]

Please see: https://bugs.launchpad.net/ubuntu/+source/network-manager/+bug/1287080

(Ubuntu-bug wouldn't let me add this information to that bug, presumably it can't see it because its a bug reported against a different application).

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: xfce4-panel 4.10.0-1ubuntu2
ProcVersionSignature: Ubuntu 3.8.0-35.50-generic 3.8.13.13
Uname: Linux 3.8.0-35-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.5
Architecture: amd64
Date: Mon Mar 3 09:32:16 2014
InstallationDate: Installed on 2012-11-28 (459 days ago)
InstallationMedia: Xubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.1)
MarkForUpload: True
SourcePackage: xfce4-panel
UpgradeStatus: Upgraded to raring on 2013-05-14 (292 days ago)