moved event.preventDefault() inside of if-then structure #1760
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(resubmit)
I moved the event.preventDefault to inside the if-then structure, so that other key commands will still work. It is necessary for the Tab key to get passed to the browser so a keyboard-only user can navigate through this UI element. If the Tab key is prevented, a keyboard-only user has no way of leaving the UI element once they are in it. See also #1758