Another minor glitch: in a browser, each press of up or down arrow, when there is no cursor (after clicking outside of an entry box like this one), moves text up or down.  (3 lines for me in FF, even though wheel click moved more) In an editor, each press moves the *cursor* up or down one line, and text only moves when the cursor is at the top or bottom of the window.  The read-only text has an invisible cursor, which one must invisibly move to top or bottom before anything happens.

Some of the code with #17535 might help, but not looking now.

Another enhancement: use user set Initial Window size.