adding new device: <return> in code-entry field doesn't submit code

Just a small UI nit: I added a new device today, and dutifully typed the code from the new device into the text field on the old device. Then I hit Return, but instead of the old device accepting the code (as I would have expected), it apparently inserted a literal CR/LF into the text field. I had to delete that and then hit the submit button directly. Since codes don't have newlines, I'd expect Return to perform the submit too.

Incidentally, it wasn't immediately obvious that I needed to get a code from the second machine. The text says "Type in text code. In the Keybase app on your computer, go to Devices > Add a new device". On the other computer, I started Keybase (for the first time), type in my username, then saw something about having another device, and found the code to type in.

I was uncertain about the flow, maybe because of the fake code grayed-out in the code-entry field on the old computer. Maybe the text could say "Type in a text code from the new device. To get it, start the Keybase app on the new computer, go to Devices > Add a new device".

(also, there's something funny with the flow, I wasn't even able to get to the "Add a new device" menu on the new computer, since I was still in the new-install sign-into-an-account flow).

I think something else is also wonky, because the new computer is recognized from the new computer and from the website (https://keybase.io/warner/devices), but not from the old computer (where I typed in the code). Restarting the Keybase app on the old machine didn't seem to help.

thanks!
-Brian

Keybase GUI Version: 1.0.18-20170209165653+17b641d

No source file, test, or entry point is identified. Start by locating the device-add code-entry UI and its submit handling; done means Return submits the code, while the additional onboarding and device-recognition reports are clarified or split.