[Evolution] How to make Delete Keep Window Open

[Matt Neimeyer <lists neimeyer org>]

Hey All,

If I double click on a message and open it in a child window, then the
delete key used to keep that window open and just go to the next
message. Now if I hit delete it closes that window and I have to open a
new window.

Is this configurable somewhere? I'd like it to keep the window open.

Thanks

Matt