New build

A new build (12) is up. Based on what people said here, I made three changes.

1. It's now possible to press a bunch of keys simultaneously and they all get entered. They don't have to be entered one at a time.

2. There are now instructions, a line of text above the entry field that says, "Press keys or select from list with mouse."

3. If you enter a duplicate key, the field now becomes blank and that field retains the focus after the message box is closed.

Thanks very much for the suggestions.

I'm very curious to know whether people think change 1 eliminates the need for a second easy-mode dialog box.