With regards to network-manager, no apt-get should not pull in network-manager components for the openconnect package.
If you want plain openconnect from the command line, which is perfectly suitable for many, install the openconnect package.
If you want Unity or GNOME network-manager VPN support, install network-manager-openconnect-gnome.
If you want KDE network-manager VPN support, install plasma-nm.
With regards to network-manager, no apt-get should not pull in network-manager components for the openconnect package.
If you want plain openconnect from the command line, which is perfectly suitable for many, install the openconnect package.
If you want Unity or GNOME network-manager VPN support, install network- manager- openconnect- gnome.
If you want KDE network-manager VPN support, install plasma-nm.