[Users] Delete button no longer jumps to next unread message

[John Jason Jordan]

I did a dist-upgrade from Xubuntu 16.04-6 to 18.04 and now I have
Claws Mail 3.16.0. The upgrade (as usual) messed up a lot of things in
Claws that I have fixed, but one that I cannot fix is that clicking on
the Delete button deletes the selected message(s), but no longer
automatically jumps to the next unread message. I've looked all over
the Preferences and other options and I can't figure out how to turn
this back on. I hope someone can point me to the solution. Thanks in
advance.