This means NetObject is now obsolete and can be removed.
There was a GtkSizeGroup that the mobile settings used, but it isn't clear if
this is still relevant. It should be added back later if found to be (this code
is likely to be removed to make way for a dedicated mobile panel).
We also remove support for WiMAX (now unsupported by NetworkManager),
and InfiniBand (Enterprise feature), and the use of
the deprecated NM_SETTING_WIRELESS_SEC property.
With help from network-manager-applet patches by Jiří Klimeš and
Dan Winship.
https://bugzilla.gnome.org/show_bug.cgi?id=765910
