Only remove or add contacts instead of removing and adding the whole contacts list on refresh
Only remove or add contacts instead of removing and adding the whole contacts list on refresh

mck182/telepathy-qt4-yell,mck182/telepathy-qt4-yell,freedesktop-unofficial-mirror/telepathy__telepathy-qt4-yell,freedesktop-unofficial-mirror/telepathy__telepathy-qt4-yell,freedesktop-unofficial-mirror/telepathy__telepathy-qt4-yell,mck182/telepathy-qt4-yell,mck182/telepathy-qt4-yell,freedesktop-unofficial-mirror/telepathy__telepathy-qt4-yell