Deselect on click

[Mark Powell]

Simple I'm sure, but it evades me...

I have a field that I'm using as a clickable list.  Its listBehavior,
toggleHilites, noncontiguousHilites, autoHilite, are all set to true.  The
standalone works as I want, except for one thing.  If the user has a line or
lines already selected, then clicks on another line *without* using Shift or
Command/Control keys, all the previously selected lines should un-highlight
and the new line should then be highlighted by itself.  At least that is how
it works in applications that I use.

How do I do that?

Mark