McdAccount: keep track of ConnectionError[Details], and emit them in signals
McdAccount: keep track of ConnectionError[Details], and emit them in signals

telepathy-glib support will be needed to have them as properties too.

freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control,freedesktop-unofficial-mirror/telepathy__telepathy-mission-control