Problem: An accidental key press can dismiss a routed message to be
shown in full before the user was able to read it.
'verbose' message routing based on an outdated condition results
in "last_set" messages being separated from its message pair.
Solution: Show a message to be shown in full in the cmdline window instead
of the pager. Keep it there and update the spill indicator when
the message is dismissed.
Remove the 'verbose' message routing.