Fix shouldNotifyItemChanged()
Fix shouldNotifyItemChanged()

We receive 2 itemChanged signal during ItemModifyJob, one for this
command :

" UID STORE 1 NOREV  ( ATR:ENTITYDISPLAY "(\"\" \"\" \"\" ())""

and another for :

" UID STORE 1 NOREV  (REMOTEID "{7824df00-2fd6-47a4-8319-52659dc82005}"
GID "7287c53c-9acd-49c1-886b-5fb563792f1b" DIRTY false"

sandsmark/zanshin,kolab-groupware/zanshin,kolab-groupware/zanshin,kolab-groupware/zanshin,sandsmark/zanshin,sandsmark/zanshin