change confusing connection dialog names

[Grant Mulitz (gmulz)]

i always get confused what "host" mean and what "signaling address" means. there's already a "host" name on the app that means the literal name of the computer, but here "host" means "remote address", and "signaling address" sounds like it should mean the DNS address but it actually means the address of the signaling server

made copy changes to make this clearer

(what host means in regular app:)

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[Devin T. Currie (DTCurrie)]

I am not opposed to this, but "host" and "signalingAddress" are both taken straight from the TypeScript SDK, so there may be a broader conversation around naming for these fields for now.

Either way, we are pulling the connection out to a plugin, and so it would make more sense to address this there.

Also may be worth noting the app is actually wrong here. What it is calling host in the status dropdown is actually the hostname field.

And what we need to pass to the host field in the dial config comes from the robot's remoteAddress field. so the app and the SDK don't agree on that field name.