[Users] Option to go to previous/next message after deleting

[zacaj]

Hi,

I've been looking at switching to Claws after getting fed up with
thunderbird, however it's constantly annoying me that, if I have my
messages sorted in a descending direction, clicking delete selects the
previous message, which I've already read, instead of the next message
(which is what I want to do as I go through all my mail.  It seems that
it just always goes to the message below the current message,
regardless of sort order, which doesn't seem right...