UX issue: Pressing enter with color picker open deletes the numbers

Observed during a workshop this weekend:

A student would use the color picker and press enter while it was still open, thinking that is the way to get out of the color picker. When she did that, the enter would delete the numbers and put the end parentheses on the next line, leading to confusion and messy code.

Maybe we should close the color picker when we get an enter key and the color picker is open?

http://g.recordit.co/HT862uKMps.gif

Reproduce the issue using the linked recording as a guide: open the color picker and press Enter while it remains open. Locate the color picker's keyboard handling, then verify that Enter closes the picker without deleting numbers or moving the closing parenthesis to a new line.

Written by the indexing model from the issue text.