ChannelTypeContactList: add note that empty groups might vanish on disconnect
ChannelTypeContactList: add note that empty groups might vanish on disconnect

Also remove resolved FIXME comment.

20061017150640-53eee-675d276e177fc0835952827fefa1762fad87817d.gz

freedesktop-unofficial-mirror/telepathy__telepathy-spec,TelepathyIM/telepathy-spec