Network status monitor doesn't save interface name

[Dmitry]

Steps to reproduce:

1) Add "Network status monitor" applet to the panel
2) It will use eth0 which is not available with modern kernels
3) Click on the "Network status monitor" icon, configuration dialog will appear
4) Select "ens33" as a network interface

Result: "Network status monitor" will start to monitor ens33 and it looks like it works fine.

Now logout/reboot.

Result: "Network status monitor" reverts to eth0.

~/.config/lxpanel/Lubuntu/panels/panel contains no interfaces configured:

Plugin {
  type=netstatus
  Config {
  }
}

ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: lxpanel 0.8.2-1ubuntu2
ProcVersionSignature: Ubuntu 4.4.0-47.68-generic 4.4.24
Uname: Linux 4.4.0-47-generic x86_64
ApportVersion: 2.20.1-0ubuntu2.1
Architecture: i386
Config_Home_Lubuntu:
 [Command]
 Logout=lxsession-default quit
CurrentDesktop: LXDE
Date: Tue Nov 29 10:07:56 2016
InstallationDate: Installed on 2016-10-13 (46 days ago)
InstallationMedia: Lubuntu 16.04.1 LTS "Xenial Xerus" - Release i386 (20160720)
SourcePackage: lxpanel
UpgradeStatus: No upgrade log present (probably fresh install)