network manager applet appears after hibernate even when it doesn't manage network devices.

[Joel Ebel]

If network manager is not responsible for managing any devices, it normally does not appear in the notification area. However, after a hibernate, network manager applet re-appears with a red exclamation point over it. It still lists the ethernet device as "device not managed". Restarting makes it go away again.

To reproduce:
1. Install Lucid on a computer with one ethernet device.
2. Add this to /etc/network/interfaces:
auto eth0
iface eth0 inet dhcp
3. Reboot and see that network-manager isn't displayed.
4. Hibernate/thaw and see that network-manager applet is displayed.

Expected behavior is that network manager applet remains invisible even after hibernate if it is not responsible for managing any devices.