Problem: A message emitted while a previous expanded message is still
visible opens the pager and enters it, moving focus away from
the buffer window without an explicit request (#41061).
Solution: Only enter the pager when it was explicitly requested ("g<",
:messages, or entered from the expanded cmdline). An unfocused
pager is dismissed by the cmdline key handler, which stays armed
across the cmdline and no longer dismisses on non-typed keys
(#39221).
a29a9130a9
