Fix error emptying trash/junk folders

Add a ReplayQueue checkpoint after queing the empty op to keep the
folder open long enought that all flag updates and expunge notifies are
received and processed.
5 jobs for wip/empty-folder-errors in 29 minutes and 39 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #388475
fedora

00:10:03

passed #388476
ubuntu

00:12:55

 
  Test
passed #388477
flatpak

00:15:05

 
  Deploy
passed #388478
review

00:00:38

passed #388479
allowed to fail manual
stop_review

00:01:00