Bug#822429: Acknowledgement (plasma-nm: Upstream Bug 362141: Connection editor fails with "connection.gateway-ping-timeout: can not set property: value")
Note that a workaround is to use the ncurses "nmtui" command line tool,
or the Gnome Network Connections tool (apt-get install
network-manager-gnome).
It may be necessary to manually restart network manager after using
these tools (sudo systemctl restart NetworkManager.service), as I found
they saved the configuration changes but did not implement them.
I have found the KDE Connection Editor in it's current state to be
completely unusable.
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