Improvements and fixes

Remote-access connections a plant dials out to now show as much as the ones it accepts.

• A remote-access connection the plant dials out to now shows its remote site under the name it was given, with a throughput chart.
• When a VPN is added, an IPsec configuration file can now be uploaded and its values filled in.
• A plant's OpenVPN remote access offered over IPv6 now accepts connections from IPv6 clients.
• Connected clients on a plant's VPN tab are now named after their protocol, instead of a guess at the device at the far end.
• Long lines in a VPN log now scroll sideways inside the window instead of running off the edge.