Ignore any IDLE status responses in Imap.ClientSession's handler

Since Imap.ClientConnection reports all commands and responses,
including IDLE, and since ClientSession snoops on raw IMAP responses
from the connection to drive its FSM, ILDE responses may inadvertently
cause FSM handlers. So ensure we don't have an IDLE reponse before
doiing something with it.
6 jobs for wip/limit-replay-op-retries in 9 minutes and 37 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #208414
fedora

00:03:20

passed #208415
ubuntu

00:02:58

 
  Test
passed #208416
deb-package

00:03:46

passed #208417
flatpak

00:05:24

 
  Deploy
passed #208418
review

00:00:32

passed #208419
allowed to fail manual
stop_review

00:00:19