Fix "Unrecognized GUI edit" warning

[emilykl]

Closes #7809

Fix "Unrecognized GUI edit" warning by adding a missing selections layout UI pattern and mapping it to selectionrevision.

Also add a regression test for the issue.

Steps for testing

1. Go to @lana-k's codepen
2. Click "Settings" in the upper-right corner
3. Under "Add External Scripts/Pens", replace the Plotly 3.5.1 CDN link with the link to the dev build for this PR
4. Click "Close"
5. Click "Run" in the upper-right corner
6. Follow the reproduction steps in [BUG]: Many "unrecognized GUI edit: selections[0]..." warnings when update the plot after applying selection. #7809. The "Unrecognized GUI edit" notifications should NOT show up.