Amr Ibrahim, updated all available packages from proposed repository. My network-manager-gnome version is now 1.2.0-0ubuntu0.16.04.4. Still can't select private key.
Fedor, the provided workaround seems to be working. But there is strange message appears that says that my private key is not protected by password. But it is not true, my key is protected. And entered private key password works well. Workaround works well for wired and wifi connections.
Amr Ibrahim, updated all available packages from proposed repository. My network- manager- gnome version is now 1.2.0-0ubuntu0. 16.04.4. Still can't select private key.
Fedor, the provided workaround seems to be working. But there is strange message appears that says that my private key is not protected by password. But it is not true, my key is protected. And entered private key password works well. Workaround works well for wired and wifi connections.