Clicking in REPL doesn't close Help popup

The Help popup is closed by a click in the code editor window, but not in the REPL text, or in the blue space at the top of the page.

The load/save dialogue is closed by a click in the REPL, but not in the blue top space.

Start by reproducing the Help popup and load/save dialogue behavior in the browser, checking clicks in the code editor, REPL text, and blue space at the top. Done means both overlays close consistently for the click locations described in the issue.

Written by the indexing model from the issue text.