cubicweb-email #9360100 AddEmailPreHook uses the EmailThread's title to look for an existing thread [validation pending]

which is obviously nonsense

prioritynormal
typebug
done in1.11.1
load left0.000
closed by#1fa5e2c98fce [hook] do NOT match on EMailThread.title when looking for exising thread (closes #9360100)
patch[hook] do NOT match on EMailThread.title when looking for exising thread (closes #9360100) [applied]