Web UI only allows one connection per host

[0x1a8510f2]

Describe the bug
The only way to add connections to hosts is via a button which disappears when there are connections. This effectively means that one can only add a single connection through the web UI per host. See below:

^ With no connections, a button appears to add one

^ Unlike the networks, when connections are present, there no longer is a button to add more

Expected behavior
Like with networks, there should always be a button to add more connections as they are supported (you can connect multiple peers to one and then it will have multiple connections).