Fix typo in selector

[annthurium]

Fixes #1675

Requirements

Description of the Change

When I migrated to use the Command component instead of the command registry, I made a typo in the registry target. That means that none of these events were bubbling up to the correct selector, which broke keyboard input on the co author dialog.

I spent a half day trying to write unit tests for these changes to prevent future regressions. However, it ended up being tricker than I anticipated, because:

• Enzyme doesn't have great support for key events.
• I don't really understand why this whole proxyKeyCode was necessary to make keyboard events work with react-select in the first place. I'm sure there's a good reason, I just don't know what it is. I reached out to @niik in case he remembers. Knowing this will help me write a better test.

[coveralls]

Coverage increased (+0.08%) to 80.215% when pulling f5c6649 on tt-18-sept-coauthor-bug into e482833 on master.